Well she is finally here.

It came with a slant 6? Or straight, either way, i think the guy my brother bought it from put the 318 in it. Supposedly this dude worked at the dodge dealership where the car was traded into by the original owner. He got it, then sold to my brother in like 89 or 90.

I know this may be flogging a dead horse but, since the current 318 was installed by a Dodge dealership dude, there may have been significant changes/additions/improvements to it already and you won't know until you fire it up. How close are you to trying to run it?