[tjyak50]

These are pure Individual Throttle Bodies with no interconnect. No vacuum assist and no brake boost. There is no communication between barrels at all.

The picture you see that I posted with light shined in the hole is all dialed in at about 1000 rpm. If I setup the butterfly so that the 1st hole is immediately exposed with throttle movement I would be at 1800 rpm.

Indeed I am talking about a New 1st Hole. One positioned exactly over the B-fly so that any throttle movement exposes the new first hole to vacuum and fuel can flow.

With the progression ports as they were designed (and not designed for THIS motor I am sure) the b-fly has to open a relatively long way before the 1st hole is exposed.

They do have a "soft mount".