Yes I already had the rods. I also want to use a set of 722 heads that’s why I’m leaning towards the 4” stroke combo. I have one in the car now with 722 heads and 4” stroke and I’m getting away with 94 octane and no ping with 24 degrees initial timing and 10 mechanical. I know there’s a 4.21 crankshaft with 3” mains and Pontiac rod journals available. I just wanted to keep the dynamic compression down and not sure if the 4.21” will push it over the edge and make it ping. Was thinking maybe the 4.21” crank and use the road paver cam instead of the old faithful. That might help with running 94 pump gas? Idk. The rods are tomahawk max a lite a beams at 706 grams so I would like to use them. I already replaced the FAKE CHINESE ARP BOLTS for real arp bolts. Cliff Ruffles mentioned to me that the rpm/tomahawk rods had fake Chinese imitation arp bolts. Recommended to buy a set from arp in California ro know that I have the real ones.
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