The real question is, why are we just hearing about these bosses and why no pictures and dyno videos?😂😂

I guess I should have looked down the list before posting. Thanks again. good read by the way

Blunt statement. I WILL NEVER USE A CARBURETOR AGAIN.

My first car started life with a 2 barrel carb. ('53 Merc). As I started hot-rodding, I converted to 3 Stromberg 97s on an Offenhauser manifold. I learned a lot.

The next car was a '54 Customline, into which I installed a rebuilt '57 312. Over a period of time I went from a single 2 barrel to 3 2s, and then a factory race manifold with a pair of 4 barrels. Then I went to a Paxton VS 59 with a pair of bonnets on the carbs.

My next car was a new '64 Custom with a 427-T engine with a pair of Holleys.

A year later I got a new Mustang with the 'K' engine, and before long I'd installed the Paxton VS59 in an enclosure which required a Holley re-done by H. Droste who worked at Triple-E but was a Holley employee.

All of the above is to say that I've had LOTS of experience with carbs. I won't bother to detail my side excursions with DCOE Webers on a couple of occasions.

I've even had experience with mechanical FI, including one that was a daily driver for a couple of years.

And then, when Holley first came out with EFI designed to retrofit on a carbureted engine, I was Tech Editor-At-Large for Super Ford Magazine. I talked to their new EFI group, asking when they'd be coming out with a package for a fit on a dual-quad application. After saying it'd be several months, at least, they admitted the idea was on the back burner. I offered to be the guinea pig in putting things together---and write about the adventure.

We used Brother Lon's '67 Mustang as the test bed. It got a 427 TP engine when only a few months old, with components sourced from the LeMans GT 40 program. We received a surplus-to-requirements upper end that included a pair of heads, a dual-plane manifold, and a pair of well-tuned 652 mechanical-secondary Holley carbs designed for the combination.

Prior to the foray into EFI-land, we'd tried about as many pairs of different configuration Holleys on that car as possible. The ultimate arrangement of EFI throttle-bodies we tested and reported on was enough better in so many ways as to persuade me that the age of carburetion was past. How long has it been since a car came from a factory with a carb? Please see my opening statement.

KS

more parts added

I certainly would trust Blair with anything he did to the heads.
He has more experience with race winning FE's than most.

JMO