Ok, I have some basic mechanical abilities but not the most knowledge in the world. I have a V6 2.8 (I think) in my '84 bird and will eventualy be wanting to drop in a 305 or better yet a 350. Possibly even something out of a GTA. Anywho, I have heard that changing engins sometimes results in having to change trannys as well. I could use some guidance on how to determine exactly what engine and what tranny I have. It is an old car and I don't trust paper documentation. I would rather like to know if there is an ID somewhere actualy on the engine and/or tranny that says what it is.

 

For an '84, count the spark plugs. If six, your tranny will not fit a V8.

I assume you're talking about an automatic. It should have four forward positions, which means a V8 TH700R4 will fit the crossmember, driveshaft, torque arm, and shifter just fine. You'll need V8 cooling lines and TV cable. Now you're getting into swap details, though, so do a search on this forum for more info on what's involved with that.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" Hedders, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny. Daily driver while Camaro was being put together.