F85 330 ctls

Will a 1980 Rochester work on a stock 330 4 barrel intake( stock) they seem like they are the same size.

BangScreech4-4-2

Did the 330 manifold mount a Quadrajet or a 4GC?

joe_padavano

What year 330? The 64-65 330s used the square-bore 4GC. The 66-67 330s used the Quadrajet. An emissions-compliant 1980s Qjet will bolt on to the 66-67 manifold. That's about all you can say for it. Connections will be different, throttle linkage will be different, and the one certainty is that the jetting will be wrong.

F85 330 ctls

67 330 cutlass

F85 330 ctls

So get one from that yr?would it work better?

joe_padavano

One from a 1967 330 would work really well.

F85 330 ctls

Thanks now to find one

joe_padavano

Carb number 7027036. There are at least five of them on ebay right now.

no1oldsfan

And rebuilt.

F85 330 ctls

Thank you, on to ebay

F85 330 ctls

Would carburetor 7028250 work well in my 67 330 f85?

joe_padavano

It will "work", but it won't be a bolt-on. 7028250 is from a 1968 350. The throttle linkage and the divorced choke are both different from 1967 to 1968. A correct 1967 carb would be best. Failing that, a 1970 carb (7040250) with the integral choke would be easier to convert to electric, solving the choke problem. You'll still need to modify your accelerator rod to fit any 1968-newer Qjet, however.

Sugar Bear

It is worth the time to try to find the exact carburetor by #. This will alleviate fabricating/modifying things to a level that will work but never really be correct. Think of "universal fits all" vs the "correct" stuff...there is a big difference.

Good luck!!!