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Ok, the car is a 70 challenger with fast ratio steering, so not sure if headers will fit or not.
The car is a standard.
Rear gears are 3.55

The reason I said 400hp is just to clarify that I'm not looking for a stroker motor, just a point of reference. Mild build.
Since the motor is in great shape, I was hopeing to get better response.

Are the 906 heads a good option for this motor or would bolting on different heads make a big difference?




If the 906 heads are fresh don't worry about it, you're not looking for 500 HP so you will get by fine with 9 or 9.5:1 compression




I don't think you will get your compression in the 9s with a smog block and piston combo and 906s. Or maybe I misunderstood your post.


Careful, your character's showing!