Pontiac 400 carb setup
Have a buddy with a 77 TA with a 400 motor. Edelbrock Performer top end with the Performer 87cc heads (215cc, 2.11intake valves), performer cam, and performer intake. Stock cubes but forged pistons and rods.
It has the really shitty spread bore 4175 series 650 Holley. The thing is garage.
I've got a 750 holly DP on my chevelle that's not being used at the moment. With a little massaging we got it to fit the factory shaker hood and are using a spread bore to square bore adapter plate.
Question is if I jet that 750 DP down will it be OK with his setup? His car is a bit of a dog at the moment and his 4175 has no tuning ability besides jets and idle air mixture. I figure we can dial in my 750 a lot better than his and jet it down to not bog when the mechanical secondaries open.
So main question, will the 750 double pumper too much? Any tuning recommendations based off what you see with his setup?
Thanks for any info.
2800 stall, TH-350 with a shift kit, 3:42 rear gears, vacuum advance HEI distributor, MSD 6AL box, Long Tube headers, Pypes Exhaust
2006 GTO M6
Motor - Stock with Vararam
Bunch of suspension
Bunch of brakes
12.81 @ 110.6 2.03 60'