yup l looked it up in the parts book / there AINT a differnce between 77 and 78 / the part number for both years is # 3739-464-5
Is this a partnumber from Dodge?
Because all listings I have seen mention specifically different parts for the later and older style. Later style being '78 to '86. See http://www.thecliphouse.com/dodge-truck-vehicle-moulding.html
None of the suppliers can confirm that his part will fit earlier style trucks.
Problem again is that I really want to know 100% sure that they ARE interchangeable. I don't like to order two seals at $125 each only to find out that they do not fit.
So I was hoping to hear that someone actually tried this and confirmed that they fit or easily can be made to fit.
Please forgive me for being so suspicious, but I've allready had my share of incorrect parts. Most of them were "guaranteed" to be the correct part or direct fit or interchangeable.
Extra problem for me (again) is that I live in the Netherlands (Europe). Most parts are not available, so I have to order directly from the U.S.A. So if I receive an incorrect part, it is impossible to return it; returning costs are mostly higher that the price of the part itself.
Thanks sofar on the replies!!