as far as 2.3 and 5.0 stuff being interchangeable, you prolly don't wanna do that. The 2.3 is a p***y engine, and any tranny parts would be torn apart by the 5 liter, not to mention I don't think they share the same parts. as for going to a 5-speed, it takes some work, U need to by the tranny, the clutch assembly, the petal assembly, which is actualy quite expensive, even used, and all he miscalanious (sp.??) parts to go along with it. If I were you, I would try and find some one selling a recently re-build aod or c-4, c-6 and just put a better converter in it. When my bro blew the tranny in his T-Bird he got a very nicely built aod from a 450 h.p stang for 250$, thing shifts like gold, and it takes all the abuse my bro throws at it, which is alot. If you want better information, go to
www.corral.net just like thirdgen.org, only for stangbangers, good luck
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1987 Pontiac Firebird Formula 350
1 of 2,384 made, Black with Silver decals
350 TPI
700R-4 Tranny with TCI shift kit and Corvette servo with TV boost sleeve
TCI saturday night special 2200-2500 stall converter
WS6 supsension
SLP headers with full 3" exhaust exiting through an SLP dual 2.5" tip muffler
SLP airfoil
180 degree thermostat
hypertech "performance" chip
3.73 rear
Viper talkin alarm with remote start
My 383 is in the process of being built right now, hopefully to make it's debut by middle December. . . many more mods to come in the summer. . maybe some experimentations with juice. . have some track times my independence day.