[beerman]

The intake I picked up was cast in 68, has the trapezoidal carb flange, a divider in the plenum, and no divider in the 1-3, 4-6 intake ports.

I have a trans-dapt trapezoidal to holley 2bbl adapter that I thought about using with a GM TBI adapter, but it looks like a great source for vacuum leaks. I was planning to use your idea and mill the top of the intake flat and add a single 4bbl to TBI adapter.


Your saying there are small port trapezoidal carb flange intakes which would have a divider in the 1-3, 4-6 intake ports for the small port heads. This would be perfect for a 305 and not require the larger intake gaskets.