I use to have a 1967 Belvedere II with a LA 318 with a 2bbl Stromberg WWC3 carb. I used a 273 Barracuda Formula S single plane 4 bbl manifold and a Carter 3854S carb from the Formula S engine, along with the Formula S cam, springs, lifters, rocker arms and push rods and a re-curved Prestolite dual point distributor from the Formula S. The car had a TF 727A, 3.55 rear gears. EXCELLENT PERFORMANCE..... Several years later, i substituted the carb from a 1968 340 auto trans engine, Carter AVS series, modified the 273 4bbl single plane intake manifold by removing the center divider between the carb bores, yielding an open plenum, i re-drilled the AVS carb mounting flange to accept the 273 manifold stud spacing. I used the AVS choke and origion throttle linkage. The result was additional top end performance slightly better MPG. I used the unsilenced 340 air filter assemnly to fit the AVS carb. ABSOLUTELY no regrets other than I wish I still had the car.....surprised many Camero's and Mustang's during a few red light contests......
BOB RENTON