ok. i have a 5.0 out of an 90 stang and I was wondering what I need to do to make it carb?? I think I need a manual fuel pump. and where would u mount it on the block?? do I need a different timing cover?? any thing else u can think of?? well besides an intake and carb??
Your best be is to visit the Stangnet's Classic Mustang forum. They will have much better insight into what you need to do. The engine itself is a one for one swap with the 260 and 289 engines tha came in the classic Mustangs. All you will need is a suitable carb, intake manifold, distributor and electric fuel pump.
While you are at the electrical part, you'll need a Durspark or similar ignition system with a mechanical spark advance. The 85 Mustang GT 5 speed has a suitable Duraspark distributor with a steel gear compatible with the roller camshaft. The EFI ignition depends on the EFI sensors to advance the spark. Rip out the TPS and MAP/Baro sensors and the computer will have no idea of the proper ignition timing for best performance. Running a fixed timing setting is only for test purposes or for a race track only car. Don't try it on the street: the results will not be nearly as good as a properly setup Durspark or equal. You will need to construct a wiring harness from the ‘85 carb distributor to the Duraspark box if you go Duraspark, or other distributor to coil wiring.
You will need an external electric fuel pump unless you change the timing cover for one with the mechanical fuel pump mount on it. You will need to add a relay & switch and wire in the existing inertia switch for an external low pressure electric fuel pump. Do not try to wire the fuel pump without the relay. The 15-20 amps the pump pulls will overload the circuit. This will take power away from other items on the same circuit or cause the fuse or fuse link to blow.