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Old 12-18-2017, 09:02 AM
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Tom Vaught Tom Vaught is offline
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Here is a nice little short article on the Holley 6-Pack 2 BBL carbs. just enough info to wet your taste buds a bit. I just picked the article out of the air.

http://www.rodauthority.com/news/his...reproductions/

The 6-Pack System can in two versions:
A production Vacuum Secondary version used on Mopar vehicles and Chevrolet vehicles, and also different versions (Mechanical and Vacuum) used on a number of Ford Engines over the years).

Ford had the 289 SB Ford set-ups, the 390 and 427 Ford set-ups with mechanical linkage, and a rare "production run" of NASCAR 366 cid Vacuum Secondary induction systems. 500 systems were made. Less than 20 systems out there today. Most were destroyed after NASCAR refused to allow the carbs to be used.

The Corvette got the 435 HP engine with 3 Holley 2-BBLs.
The Mopar Guys got the 6-Pack systems in a variety of vehicles.
The Ford guys got the "Tri-Power" set-ups in a lot of vehicles (early 60s days). (before they went to Dual Quad Holleys).

I am amazed at the prices that Holley wants for a repop set of the carbs today.
Almost $900 for the center carb alone.
$500+ for each end carb.
(I bought complete (new) Holley carbs in the boxes for 1/2 that price years ago and that was too much money vs slightly used.)

So I will post a Picture of a Holley Vacuum 6-Pack System for you to view.

I personally own the original Dyno Carbs used to generate the HP advertised rating for the MOPAR 375 HP 440 cid engines. They could be considered "Master Carbs" as everything on the carbs was verified on the dyno and air box. But a "Master Carb" is typically used to verify Production Carbs meet quality checks and match the Master Carbs calibration within specs.

More on Holley 6-Pack set-ups to follow.

This website has some good info on the rare Tri-Power systems (Ford mostly The web guy is a Ford Guy)
http://ford6v.com/ford-6v-tech

"351C 6VFORD 366 NASCAR ENGINE PROGRAM
Bob Champion’s 351C , The Cleveland 6V intake manifold. According to Tom Vaught, recently retired after 39 years as Ford Motor Company’s Boosted Engine Design Engineer and former Holley Engineer on the design team responsible for the development of the Holley Carburetion for the Cleveland 366 6V intake manifold, this 6V carburetion program came about through Ford’s 366 NASCAR Engine program where they built 500 366ci Cleveland motors with 6V intakes for NASCAR competition, only to have NASCAR disallow their use, causing Ford to physically destroy all the intakes. As apart of the Ford NASCAR 366 Engine program, Tom Vaught of Ford Motor Company (Holley Carburetors then) was a member of the design team that built the Holley 2300 6V carburetors for this special Ford project, using Holley 2300 vacuum secondary 6V carburetors.
During the testing, it was determined that the 1350cfm flow of all three carburetors was too much air and fuel for the Ford 366 program so these carburetors were sleeved for the Ford NASCAR 366 Program. After the comprehensive destruction of the 500 original motors, intakes and 1500 Holley carburetors, very few survived. The few in existence today were hiding on shelves and missed the actual Ford directed physical destruction.
Recently, a single Holley Sleeved 6V carburetor was sold with one of the very few 4296V intake manifolds still hanging around. This intake manifold was an original which had remained in the care of Buddy Barr Castings in Los Angeles , being sold in late 2004 to a Ford collector in New Mexico. Below are several pictures of the original Holley Sleeved 6V carb which belongs to Eric Hirengen of Farmington, New Mexico. This carburetor is an ultra rare piece. When Ford cancelled the Ford 366 NASCAR program, they decided to abandon the Holley 6V carburetors which they had Holley develop for them. Holley then offered them to GM and MOPAR. GM was not interested, but MOPAR was. These specific carburetors were then modified and converted from vacuum secondary to full mechanical in the form of Holley List 4782/4783s which MOPAR offered for competition uses thereafter."

Tom V.
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Last edited by Tom Vaught; 12-18-2017 at 09:14 AM.