A site search told me I should use 1/4" -20 x 3/8" long set screws.
I will not be using headers, but plan to use magnum exhaust manifolds on my '89 360 (going into the '78 in my sig).
1) Do I still need to plug the EGR holes with set screws if I use the magnum exhaust manifolds?
2) Same as #1, but if I use the stock '78 exhaust manifolds (no EGR valve that I remember on the original engine).
3) What type of head do these set screws have? Do I need to find set screws with a recessed hex (allen) head so when installed, they are flush with the block?
I have not dug my mag manifolds out of storage in the depths of my storage boxes in the garage, so I do not know how much clearance there will be, or if the mag manifolds cover the holes.
While I'm at it, is a mini-starter required to run the magnum manifolds? The only interference I can see on the passenger side looks to be the trans dipstick/fill tube, which is easy enough to move. Do magnum engines mount the starter in a lower position for clearance? Or is the smaller starter sufficient?