Idk about working on a sohc but I put a 96 auto on my 93 all I did was cut the harness of n put the tranny harness that came from my car n it works fine. But seeing how a dohc tranny bolts to a sohc motor the auto should fit with no problems.
Shiet looks like my boys old subie would be a realy good deal if it had sti tranny handles more of a beating.but other then fun car in the dirt since thates the ony thing you can do with it unless you mod it for drifting. Or yoou can race it I say stay with the coupe mmore fun I think.
The exhaust shop should hVe little rubber that they use to hang exhaust with so just cut n replace the bent part n shorten the hangers n hang it on the black rubber things to desired height.