I have 2 Q-jets, 7043256 was on the 455 I bought, 7043250 was on a 73 350 engine I bought. I'm just curious if anyone knows what the cfm is or what they are really off of. I'm not sure it either is original for the motors

 

The fourth number shows the year, so both are '73 carbs. All QJets of that era are 750 cfm.

 

Thanks for the info, I guessed both where 73, however I never new they were all 750 cfm. Hey I see in your description you have 2500 stall and 3:23. How are the street manners of your car? I was thinking 2000 stall when i do my tranny this winter and wondered how the 2500 is in the street?

 

The Hughes 2500 is very tame during "normal" driving. From what I can recall of when the car had the factory converter, this one seems to drive just the same. The only time it feels different is when going WOT from a dead stop.

 

Thanks, i'll keep that in mind, I'm pretty much stock 455 and next step is converter, trans and a rear, in thinking 3:23 because I do drive it quite a bit and want it to still be daily driver friendly