Picked up a set of used 990 heads as mine were destroyed. They have been worked over pretty well. 2.35/1.94 stainless valves, fully ported/polished, heads shaved to 113cc combustion chambers. All work was fresh with zero miles on the heads. I've pretty much already decided on the isky 280 mega jet boat cam. Just curious on what these heads are capable of? Kind of worried they may be too big for my application. The price was right and I'm on a budget.
454 4 bolt
bored 100 over
10-1 compression
all forged bottom end
all arp hardware
high rise dual plane/750 holley/logs for now.
454 4 bolt
bored 100 over
10-1 compression
all forged bottom end
all arp hardware
high rise dual plane/750 holley/logs for now.
990 heads flow numbers?
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