ok searched and cant find a clear answer here are my ?'s so will a b18c5 im and headers bolt up to the b20 head are put in a simple way are they the same bolt pattern also will are the flywheel interchangable< should be right?

 

headers yes....

Intake manifold... no

all b-series flywheels are interchangeable.

 

so just the ls im will fit then

 

yup LS should fit fine.

better one would be the 94+, or 96+ since it doesnt have the FITV on the throttle body.