I have an 89 RS that i swapped out the 305 TBI for a 350 and kept the TBI and the new 350 also has centerbolt heads. I am looking at a cam and lifter package to wake this thing up a little. Might anybody know the max ammout of lift on the center bolt heads or even a close guess would be helpful.

Thanks

 

Its about .460"-.470" for stock f-body heads, but there's no telling on your heads without knowing the exact casting number.