68 GTX carb ?

[mvent]

Looking to replace the Edelbrock carb on my 68 GTX,what cfm carb came on it originally?
Thanks
Mike

 

[Powerflite]

I think the original carb was a 4428S for a manual trans or a 4429S for an automatic. It was an AVS style carb made by Carter and is rated around 750cfm for the 440. There is also a possibility that a '68 440 motor came with a 3918 Holley with vacuum secondaries rated at 650 cfm, but I wouldn't expect those to come on a GTX. The 383 and 340 used a smaller AVS carb rated at around 625 cfm.

 

[mvent]

If memory serves me,and sometimes it doesn't,I thought they did come with 600-650 cfm AVS carb ,it's an automatic car.
Mike

 

[glassman]

I think I have one on the shelf in the warehouse. I will check. PM me if that is a 4 speed or auto. Larry

 

[67 coronet]

the 340's and 383's used 625 cfm.the 440's used 750 cfm.i have a 4429s 750 cfm,but it is corroded bad inside and wont run worth a dam.now its just a paper weight.

 

[mvent]

Thanks for looking.
Mike

 

[BbodyBrain]

580cfm... my dad bought a brand new 68 x back in the day