[bill dedman]

Thanks, Mark. I was afraid the openings for the throttle blades in the manifold were so "wide" that a Holley "square" carb flange wouldn't cover them, side-to-side.

Since this works, it makes me wonder why they make two manifolds (aftermarket), one for each carb. You'd think they'd just make a "one size fits all" manifold with both sets of hold-down bolts (speadbore and square.)

Maybe they do... and I was just unaware of it.

I appreciate the good info, Mark!