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Here is one of the links I was thinking of and had to find the file for it.4 barrel TBI's that will support up to 800hp.Stock???.Nope.But I can tell you all the number of carbs that compare to these...

Pat,I would think you know about these already.Next time you do up a 4.3,might want to do this:

http://www.speedomotive.com/ps-502-81-43l-to-272-cid-v-6-stroker-crank-kit.aspx

I am coming up...

OK Pat.Lets see what he posts for the cam numbers.

Pat-not to be indifferent,but Davide Vizard,Lingerfelter performance,Edelbrock,Holley,Accel,all have built roller hyro cam'ed over 500" lift engines on a mod'ed TBI.

Try this link:

www.TBICHIPS.com

Get in touch with them and I think they could help you.