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Author Topic: Rear end swap/ 383 stroker swap, HELP!!  (Read 1016 times)

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Offline TheGeoffster

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Rear end swap/ 383 stroker swap, HELP!!
« on: July 8, 2004, 07:21:47 PM »
Alright, got my hands on a posi rear end for my '85 Ramcharger.   Anything I should know about this rear end?   Good?  Bad?  Ugly?
I can get my hands on most of a 383 stroker motor, needs intake manny and valve covers, and various little fixums.   Will it bolt up to my 904 ok?   is it a simple swap?    
ANY HELP IS GOOD HELP!!!
-Geoff

Offline IntenseImages

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Re:Rear end swap/ 383 stroker swap, HELP!!
« Reply #1 on: July 8, 2004, 09:31:04 PM »
Alright, got my hands on a posi rear end for my '85 Ramcharger.   Anything I should know about this rear end?   Good?  Bad?  Ugly?
I can get my hands on most of a 383 stroker motor, needs intake manny and valve covers, and various little fixums.   Will it bolt up to my 904 ok?   is it a simple swap?    
ANY HELP IS GOOD HELP!!!
-Geoff

just out of curiosity, are you talking about a chevy 383 stroker? or are you talking about a dodge 383 big block? if it is a cheb engine there is no way without an adapter plate, and if it is a mopar 383 it aint gonna bolt to that 904 either.

as for the rear end, which one is it, a 8.25, a 9.25, a 8.75, a dana 60?

eric
« Last Edit: July 9, 2004, 08:45:30 AM by intenseimages »
Quote
fock!!! i just punched two babies, strangled a dolphin and castrated a panda bear because that post made me so enraged.

Offline s ǝoɾ

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #2 on: July 8, 2004, 11:32:02 PM »
either way the adapter will be about $500. bb chrysler to 904 or small block chevy to 904. but id recommend you consider a different tranny.

if you are using a bb chrysler, look into a 727 off of a big block car or truck.

if you are using small block chevy, look into appropriate hydramatic (4l60e 700r4 2004r 350 400 425 4l80e) or what ever. i dont encourage cross breeding but its yours, do as you want.

how many bolts are on diff cover? how many lugs?

either engine can be swapped in but there are various things that must be done.
Avoid replacing any part that you have not proven to be faulty through extensive testing.

Offline TheGeoffster

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Re:Rear end swap/ 383 stroker swap, HELP!!
« Reply #3 on: July 9, 2004, 03:56:34 PM »
It's a 383 chrysler. not sure of the year.   I've yet to get specific details.
The rear end is 9.25 Posi.

Offline TheRamChargerMan

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #4 on: July 9, 2004, 04:27:55 PM »
it'll work, but only with a 727.
If I can eat up 727's with a small block, I know you can with a stroked bb.
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Offline Ronknott32

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #5 on: July 9, 2004, 11:24:20 PM »

it'll work, but only with a 727.
If I can eat up 727's with a small block, I know you can with a stroked bb.


Yep, ate mine recently..
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Offline s ǝoɾ

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #6 on: July 10, 2004, 04:44:15 AM »

it'll work, but only with a 727.
If I can eat up 727's with a small block, I know you can with a stroked bb.

will fit a modifed 904 or 518.

but id stay with a 727 with beefed internals.
Avoid replacing any part that you have not proven to be faulty through extensive testing.

Offline Scoots

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #7 on: July 10, 2004, 02:51:27 PM »
So what is this "383 stroker"? Is it a Mopar block and if so is it a 383 big block or stroked small block? If its a 383bb Ive never known anybody to waste the money. You can stroke a 400 or 440 for the same money or less and end up with a lot more.
If it is indeed a 383 big block (stroked or not) you will need a 727 case from a big block engine, if it wasnt from a 4x4 then you'll need the right size output shaft.

I know of no 904 that will fit because they never used one with the short output shaft for the T case and I am 99% sure there is no A518 that will work because big blocks werent produced when that tranny came out and Mag SB's have a different bellhousing bolt pattern than BB's just like LA SB's do .

I just realized some of my abbreviations may not be understood......
BB=big block
SB=small block
Mag=Magnum
LA=PreMagnum small blocks

Hope this helps
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Offline MMiller

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #8 on: July 10, 2004, 03:55:03 PM »
What ru guys doing to your 727 to smoke them?  Are they tired, junk, or are you neutral dropping them?  Several of my buddies, my brother included use them behind stout big blocks in trucks with little problems.  They always put in fresh ones with reputable builders in when building trucks.

A stock 383 has to be better then a stock 360.  I agree, I have never heard of a "stroked" mopar 383.  If it is a BB 383, You'll need a 727B, for the B/RB series engine, apposed to the 727A for the small blocks.

383's and 400's are "B" block engines
413's and 440's are "RB" engines- this means raised block, because they have longer stroke.  Just some more info.

Michael
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Offline TheGeoffster

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #9 on: July 11, 2004, 10:14:07 AM »
It's a stroked BB, we got some crazy guys up here in Canada, like to do crazy things.  Anyhow, I've got a bigger problem, I started a new thread.

Offline s ǝoɾ

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #10 on: July 11, 2004, 11:23:38 AM »

I know of no 904 that will fit because they never used one with the short output shaft for the T case and I am 99% sure there is no A518 that will work because big blocks werent produced when that tranny came out and Mag SB's have a different bellhousing bolt pattern than BB's just like LA SB's do .


both the 904 and the 518 are adaptable to the big block engine.

it is an adapter plate.

but as mentioned by myself and others, a 727 is best option.

this is apparently a 2wd as u mentioned no 4x4 full size dodge used 904. his truck currently does have a 904.

he ask, can i bolt up stroked 383 (prolly dispalces 426/431) to my current 904.

the answer is yes in fact you can but its not most adviseable choice.

this sounds like a drag truck (suv) so in that case 727 wins by sheer strength. if highway driveabilty came into play an over drive may be in the equation.
Avoid replacing any part that you have not proven to be faulty through extensive testing.

Offline TheGeoffster

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #11 on: July 11, 2004, 12:17:36 PM »
It WILL BE a drag truck, if everything goes as planned.   a 727 is findable 'round here for sure.

Offline OkieRam440

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #12 on: July 11, 2004, 12:42:19 PM »
Stroking a 383 with a stock 440 crank will effectively create a 426 wedge at standard bore.  They will produce VERY good torque but the pistons are pretty expensive.  Much better to stroke a 400.  Less expensive and more cubes.  If you can get a good price on a stroked 383 and it is a good engine I would go for it.  But I would never build one from scratch.

Offline s ǝoɾ

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #13 on: July 11, 2004, 12:45:29 PM »
pistons are now standard price but you do lose 20ci compared to a 400.
Avoid replacing any part that you have not proven to be faulty through extensive testing.

Offline OkieRam440

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #14 on: July 11, 2004, 03:56:54 PM »

pistons are now standard price but you do lose 20ci compared to a 400.


Hey Joe, fill me in on the best place to get the pistons.  I know of a used 383 with a 440 crank that needs to be rebuilt.  If I can get the pistons at a reasonable cost I will buy it.

Offline s ǝoɾ

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #15 on: July 11, 2004, 04:15:05 PM »
im sorry for the misinforamtion

what i should have said is there are complete stroker kits available

if you piece together your own kit the 451 is so much cheaper.

pistons were $500 for any big block (full race forged light weight all that) with any config u could dream up, but i no longer see prices listed. diamond/musclemotorsracing are most likley sources.
Avoid replacing any part that you have not proven to be faulty through extensive testing.

Offline OkieRam440

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RE: Rear end swap/ 383 stroker swap, HELP!!
« Reply #16 on: July 11, 2004, 06:20:32 PM »
It's no problem.  I was getting excited because I have always been a big fan of the 383 and have several laying around.  I have never built one as a stroker because of the fact that I consider a 451 to be a better (and currently less expensive) choice as a big block stroker.

I do run a 383 in two of my Darts beacuse of the very short stroke if you consider the bore size.  Kind of like an overgrown 340.  Most people don't realize the advantage of an extremely quick reving big block in a lightweigt car.  These things will hit 7000 RPMs faster than you can blink an eye.  Of course, it doesn't help much in a heavy 4WD.