DONT CARB IT FOR CHRISTS SAKES!!! If you want more power, get some vortec heads and do the update. you should be able to do that for $800. Get some used heads on cl off a 96 newer truck and go to checker schucks or whatever for the intake that adapts it for you. for new trans, just get yours built. theres nothing wrong with the 700r4 as long as your tranny guy knows what the hell hes doing
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