Re: 305E Intake mod.
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.
Last edited by beerman; September 6th, 2018 at 11:29 PM.
Reason: added pics
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