gen 1 sbc swap?
Reply #2 –
OP, SleeperTbird has a Chevy engine in a maverick, and I think he may have had an LS in a Fox car, and there's another member here that had a Caddy 500" in a Tbird. Not exactly what you're doing, but they may be able to give some advice.
Also, there's a Fox-powered-by-GM thread on the corral, might be right up your alley.