Hallo!
I am planning of changing my stock tb,but i dont wount to by a new one,does any of you now what will be moust realistics to my other mods.
I am thinking that 600-650 cfm will be nice.
Thanks.
Sorry for my spelling.

you could try and get a stock 454 tbi but those a re hard to find. Your best bet would be to order a holley 670 tbi and intake. I wouldnt recommend using your stock intake. Not only does it suck but the bores are only 1 11/16in. rather then 2 in. Youll really need to replace the intake also to experience any improvement.