[Woodz428]

I'm in for lunch and it seems that all the books one FEs are in the shop currently, I just finished up a '70 428 SCJ, but I am pretty certain that the flywheel weight is the same for all the 428/410 engines. The part # is specific, but the weight is the same. the hatchet at the front is supposed to compensate for the extra weight of the rods. If I find our differently when I go back out,I'll repost later. But my recollection is that other than the part# it is weighted the same. I did one last year that was running a regular flywheel and we changed it, because he wanted the correct #'s one for his rare '69 Mustang GT with a SCJ. It was never a problem.