I am thinking about building a 350 for my 91 RS. I want around 400 hp and would like to use a carb for simplicity reasons. Can someone please explain any problems I might have if I go ahead and do this swap. Any info would be greatly apreciated.
Thanks
Adam

 

Without the computer, the TCC (if auto) will not lock up. Watch things like one-piece (what you have) vs. two-piece rear main seal (pre-'85 or so); straight or angled center two intake manifold bolts ('86-earlier or '87-later, respectively - except Vette). Exhaust must be upgraded - headers preferred, cat & cat back should be 3" at least, or dual cats w/3" cat-back. You'll need to regulate the fuel pressure down (3-port will work nicely and retain a return to the tank), or the in-tank should be removed and a good mechanical put on the engine. Be careful about what wiring you remove - understand what it does before you cut it. Your throttle, TV (if auto), and cruise cables will need to be changed out.

If you have to pass emissions inspection (and perhaps even just a sniffer test), forget the whole thing.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet (Holley 3310 on the way), GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).