holley ID

[jays67]

ok this may sound stupid but I have like 5 holleys 3 of the 5 have the air horns choped off ( got them this way)
one I know is a 780 it was my brothers how can I id the other 2? as the numbers are missing withthe air horn
one of the 2 I think is a 780 as my other brother had one too and the other one? help lol One I need to buy a base plate for and the 2 I need to ID i need to rebuild

[Scott Liggett]

I can do it. I'll need venturi diameter (around the boosters), bore size at the bottom, and the throttle blade diameters front and rear.
measurements should be fractions of an inch, not decimal point.

Also, do any of the have four corner idle, or two power valves?

[gearhed1971]

I have the same problem. I sthere a list of specs on the Holley page somewhere?

[SpiderGearsMan]

hey , if it is a 4150 , it has value

[SpiderGearsMan]

3310 can be either a 750 or 780 depending on the year

[SpiderGearsMan]

quick fuel is making an nhra legal 780 again