The Ford Holley 94 was designed for Ford's Load-O-Matic system that used vacuum advance only. No centrifugal advance. This has to be dealt with. 1956 Ford 272 was the last year for the Holley 94. GMC 302 used a variant of the the Holley 94 but it used only centrifugal advance. The Holley 94 from a 272 with the vacuum blocked off was was my carburetor of choice for 270 GMC. Back when I was younger I did a lot of playing around with Holley 94. 3 of them make a 302 GMC run.
