I have a 1970 350ci small block and adding a tuned port from a '91 camaro. Can I use GMPP vortec heads part #12558060 170cc intake 64cc comb? I'll be running a crane cam 100052, 272 dur. and .454 lift. Thanks

You have to use a Vortec base plate (lower manifold) then your TPI runners bolt onto that. Edelbrock and Scoggin Dickey have models, may be some available elsewhere.

I run that same cam in my 327. With a QJet I have gotten 20 mpg on a highway run so you should be able to do better with fuel injection providing you keep the revs down.