750 Holley or 650 Holley DP carb for 340-4 speed?

hi 71 duster..

45 years ago, the head mechanic at my local plymouth dealer ordered a new 68 fastback formula s 340 4 sp. he immediately installed hooker fender well headers, the "latest" edlebroc alluminum high rise manifold, a holley 750 dp with mechanical secondaries and a 3:91 gear. that car turned consistent low to mid 12s in the 1/4 with open headers and slicks. i managed to buy that car from him after he had it about a year and i never lost a street race against anything with that car.

so ... i have a very simple opinion: 340 motor; headers; edelbroc high rise manifold; holley 750 dp with mechanical secondaries; 3:91 diff - that's all you need.

one other point that you may or may not care about. when you bury your foot into the firewall with a 750 dp holley sitting on a 340, that loud screaming sound you hear not only comes from your 340 but also from that carb. i NEVER get tired of doing this as that sound always makes me wonder if the hood is going to get sucked into that holley carb. along with that frightening mopar scream comes that sudden 750 whiplash jerk as a result of the mechnical secondaries instantly dumping half your gas tank into that "semi-hemi" 340. i get a kick out of that too....