Thread: 780 Holley Double Pumper Carb for the Street??

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I ran a 750 DP on my '68 GTO - (400 cid) with a very similar cam. No problem once I had it tuned.

I always had to set my idle with the engine at full operating temp, then baby it quite a bit when it was cold. Used a manual choke. What kind of choke to you have, if any?

Yeah, it was too much cam and the wrong gearset (4.10) for the street. It was tempermental, took a lot of tuning, had too much compression for pump gas, and got horrible mileage. The MT wrinklewalls I ran werenn't quite right for the street either. However, I didn't build it as a cruiser, drive it 200 miles to a car show, or putz up and down Dodge Street on Saturday night. I built it to be a crazy-ass, take-a-deep-breath-when-you-punch-it, whadda-you-lookin-at-buddy, over-the-top, holy-cow-what's-he-got-in-that-thing, stoplight bandit. That's what one part of the hot rod world was - and still is.

Jack
My motto back in the day was: "Too much is just about right."