Strip Dominator - Spread bore weld up

Couldn't the flow get messed up having to go down and around that spread bore area instead of straight down the plenum? some air stopped up and possibly fuel falling out of suspension?
I don’t know where your getting your thoughts from but that is some truly weird science going on right there I tell ya. In short = NO. It is literally the same if the intake was already a square bore if you use what Rusty gave a link to or the spacer right on the intake or the carb right on the intake. FWIW, the plenum of a single plane intake is a chaotic place where you will find no repeatable pattern to the air and fuel flow even though the firing order never changes.

The Holley works very good on the manifold as is. The time and effort to make it a square bore could result in 5-10 possibly more HP on big power builds.
After you epoxy it square, you would still have a lot of plenum work to perform since the spreadbore pattern covers a lot of area under the carb in the plenum area.
If your looking for a square bore intake, start with a Victor.

Are you saying I should use that adapter underneath the HVH super sucker I have bolted straight to the manifold? If so could you help me understand why since the manifold has both bolt patterns already.

Thanks a lot
Yes you should use it if the super sucker has an air leak due to not being able to cover and seal on the spread bore intake. But we both know that is not the case.

The intake was designed long ago to run the stock TQ carb to meet certain racing rules of, “Must run the stock carb.” Of course, a Holley was used for every other class.

FWIW…..
Since the MoPar M1 is an updated copy, the only mods to the manifold are floor damns. The same MAY work for the Holley. (IF! Even needed.) If you ignore the floor damns, go straight to porting the intake, then you’ll have to flow test it for finding out the balance between runners. Or just slam it on and go.