Originally Posted by LA360
I've not seen a duration split like that on a Big block, it's pretty common on high HP small blocks though.

Will be interesting to see the results

Indys suggestion to me for a 572-13 head on 550 cubes was 285/305/112 in at 108. Considering those heads come with a 1.88 exhaust valve, i was surprised . They also said max lift of . 825. I will make due with my 284/296/114 with . 868 gross intake lift. Considering lash etc i will be below . 848 net lift intake.

Last edited by gregsdart; 02/07/22 08:08 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky