I used a Holley throttle body Sniper kit for one of my customers 350 Chevy stroker pump gas motor for his 1972 Chevy 3/4 ton standard cab 4x4 with an automatic with power brakes.
I used a small set ( not a big racing set) of the Trick Flow heads and increase the stroke to make the motor have 383 C.I. with the block bored to 4.030, nothing exotic at all. I installed the Sniper kit on the engine dyno and everything hook up easily, that motor made 425 HP at 6000 RPM on the third pull using Oregon pump swill . I didn't flog the heck out of the tune up on the engine dyno due to it having open headers and fresh air blowing into the dyno room. I will finish the final tune up in the truck.
I will recommend and buy those kits again: up: IHTHs