I agree, that's a potentially successful commercial project.
It offers small primaries for good response and mileage with a large plenum.
Of course, the big question still remains: is there enough sales volume to make money? I can't see 1,000 pieces, which is what you need to offset the staggering start-up cost. 100 pieces may run $500 each.
It's probably cheaper to use a Clifford with a 1/2" adapter plate to mod the bolt pattern, but it gives up whatever Pontiac learned that made them use that weird shape on the Sprint 4 × 1 manifold - the front and rear intake runners are very different.
