Thanks, they do have the smaller 216 bolt spacing. I'm not too worried about that as my intake can be easily modified to fit. Some of the BXOV's had the smaller 1 3/32" venturi but the ones I am looking at using are 1 5/32". From what I have read, 2 BXOV should work well for a street driven 235 or 261. If not, I can always add a third carb.
Bob


1950 Chevrolet 3100 Pickup