Comparing a cast iron flywheel to a billet one. Does it make any significant difference that the billet wheel is thinner than the cast one? I'm talking in the neighborhood of 1.275" thick vs 0.975". I'm kinda thinking no major issues with that, but I really don't have any experience with the billet stuff and actually forgot that's what I bought oh so many years ago. It weighs approximately 1 lb less than the cast one so not a huge variation there, 383/4bbl out thru 3.23 rear gears in a 4500 lb car would tend to make one think a heavier wheel may be better for a little more inertia on start, but......... Who has some life experience they can relate here? TIA