Which carb?

[malibu1027]

I have a 1968 Firebird with  a 69 400 engine.  The engine hasn't been modified, except the carb was replaced by the previous owner with a holley.  I'd like to junk the holley and go back to a Quadrajet.  I may be able to talk a friend out of either a 17057274 and 17058253.  If i can't get my hands on the 7274, will the 8253 work in the Pontiac? 

[Cliff Ruggles]

Both would work fine with minor recalibration, upgraded internals and correct rebuilding.

The Pontiac unit has the large front vent tube, which may be a problem unless you use the correct air cleaner base, or make a hole for it (and seal it up) in the existing base.....Cliff