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I have the 73 850 cfm thermo quad that came on it and it ran ok.Thermo quads just seem problematic to me and holley are easy to work on and find parts for.



TQ's are harder to get parts for, but everything is out there. I've been using my thermoquad in my 440 as my daily driver for 6 years and it will light the tires on demand. But I did invest some time tuning the choke and the secondaries.

If a DP's what you want, send me a pm, I've got a 650cfm holley spreadbore DP with a complete holley jet kit I would sell. 650dp is probably the best size for a combo like yours.