A few years back I used a 390 Fe Ford 2 X 4 barrel intakemanifold and had some tubes made with plate to bolt to the square body carburetor manifold about 3 in Long tubes and did the same on the top welded made me a square box for the plenum use the throttle body for a 351 Windsor Ford. So is I'm thinking why couldn't you use Buick two four barrel intake make the tubes and a plenum box use the throttle body I'm an LT1 or tuned port main configuration for injectors and mounting into the intake use the computer for a tuned port used prom chip and Superchip for something like that here's a computer-controlled GM HEI distributor O2 bung in the exhaust and Wallah you should have a tune port Buick
TA Performance makes a multi port setup that include manifold, injectors, fuel rails and throttle body
