L78 crank pulley, need help, experience, opinions

[UPH879]

Freddie, can a billet aluminium or steel one be made to mimic the original deep groove 3 pulley part? I guess it would need some testing.....although it looks like the other products including the OE pulleys where never really tested!

Also (and I think someone has already pointed this out) surely GM knew about this and put out a better pulley on later Hi- Perf big blocks.....like LS6 454?

[Too Many Projects]

Originally Posted by UPH879

Freddie, can a billet aluminium or steel one be made to mimic the original deep groove 3 pulley part? I guess it would need some testing.....although it looks like the other products including the OE pulleys where never really tested!

Also (and I think someone has already pointed this out) surely GM knew about this and put out a better pulley on later Hi- Perf big blocks.....like LS6 454?

Looks like 3921923 Crank Pulley is listed for all big blocks that used the deep groove.. L72, L78, L89, LS6. This could be in correct, as it's info I got off the web...