Right Carb for my 340

I just had my 340 rebuilt for my 69 swinger, .30 over, forged 10.5/1 slugs eagle rods arp studs finely balanced,X heads with old LD340 comp cam xtreme energy cam kit with 460/470 lift comp cam adjustable rockers with anti pump up lifters running through 727 beefed up with 323 gears I ran the original avs then builder got me a 600 holley with mechanical secondaries and changed shooters to a 31 and 35. RUNS Excellent and not bad on gas if you keep your boot out of it. Shifts into second at 6200 rpms with big bark.builder said the balanced assembly was 27 grams lighter per cylinder with the eagle rods. Im very happy, as I can drive it like a regular car and performs very well.