Which 600 and 750 Holley’s were you running? We have had a lot of trouble with new Holley stuff make decent power without an extraordinarily amount of tuning. OTB they have been 50 HP short of a well prepped carb. I can’t imagine a newer 600 DP running well at all on that combo without and insane amount of tuning. The bogging on the 750 DP is easily fixable. It could also be a sign you have some issues with the timing and carb tuning.
Last edited by Jay S; 05-13-2025 at 09:10 AM.
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