Kevin- The 3 Stromberg BXOV-2s with the bowl foreward clears the firewall on my 47 coupe. There are other issues to be aware of like your column shift linkage not clearing the back end of a non stock intake, may have to modify. Also Amazon.com should carry California Bill's Chevrolet & GMC Speed manual.
This Speed manual compares different carb, cam etc. set ups via dyno tests done back in '54, old book but a great read, much basic info still applies today.
