[Denis the Menace]

Ok, I think have a 750 double pumper w/mech secondaries. I have looked on Holley's web site and that is what I come up with, but... The don't show a number exactly like mine, I think due to age. On the air horn it's stamped...
List 4779-2
3529

On the web site can only find a part# 0-4779C. That shows above specs, but with 4 corner idle, only have 2 in the primary metering block. Ideas???

 

[DriveWFO]

Mortec lists your carb:
4779-2 750 (F)70,(R)80 6.5 4150

 

[IgnitionMan]

To decode that:

4779-2, Aftermarket performance 750 cfm, dual accelerator pumps, mechanical linkage, -2 - second revision from the origninal design

(F) 70, primary main jet
(R) 80, secondary main jet
6.5, 6.5 primary power valve

4150, 4150 design modular Holley carb, with secondary metering block

 

[Denis the Menace]

Cool. Thanks guy's. put a trick it kit in that carb many years back, just couldn't remember.

They say when you get older 2 things start to go...
Your memory...And can't remember the other.