Is the car a auto or manual trans?
The block that you have is fine to rebuild for a nice fat power increase.
Please first state the budget your looking to invest in this as that will help to get you the most bang for the Buck, and to limit crazy suggestion that sometimes get tossed around here!
What is the casting code on the center exh ports on the heads on that 400, 6X or 6 whatever?
This is where you can find the secondary code which will tell you the chamber size of the heads your working with.
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Last edited by 25stevem; 10-02-2022 at 06:09 PM.
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