I'm looking at putting an 88 13b in an 83 gs. I know I need the front cover off a 12a and I'll get the RB Crossmember along w/ new motormounts.
I'll need a 6-port adapter plate from RB as well correct? Any other parts I'll need to source from the 12a for this motor?
The 88 motor is a complete longblock, I'll be removing ac and PS... and selling the manifolds since I'll be installing a header and a carb.

Umm... yea anything else? I've been searching and all I see is 13bt info...

oh yea, i'll be getting the carter pump, a regulator and fuel pressure gauge too... almost forgot about those...

probably a RB intake manifold for a dellorto/weber/mikuni