I have read that the flywheel was lightened on the mark VI to make room for the one piece seal. Also I am going from from 454 mag(heavy pistons/rods) to vortec cast stuff and want to know what flywheel can be used and keep my starter. Is it just a matter of ordering a '96 or newer flywheel from GM? Are there 2 diameters like on the older stuff? Thanks for any part #'s ,and yes I know about cast stuff.

I think I found it. GM #14096987 casting #14096805
14" for std 454 502 91-current. Sound right?

ID # 14096805 That flywheel is for 454-502 GenV 2 piece seal,forged, external bal. and 454,502 GenVI 1 piece seal,forged, external bal.All flywheel are 30lb. 168 tooth and 14" dia.

but mine needs to be for cast now. Also I think the part # is diff due to diff machine work for bal. So what does anyone think my new flywheel should be?

They will bolt on but the balancing is different.

so anybody know the part # for a cast 454 Gen 6 ? Mr Goodwrench website shows the one in my first post which I'm assumeing is for cast since it says "standard".

454GenVI ID#10101171 balancer #10216452.I have one if you need.

thank you Fla-son.What is your e-mail?

[email protected] or call me 352-262-0395.If you want it and can use it just pay the shipping and get the dam thing out off my garage James

still need it but can't reach you,,is that phone # right?Thanks,Allen