Quadrajets Over Time

[ubushaus]

OK, here's another newbie question:
As far as maintenance, rebuilding, and performance, are the earlier year Q-Jets ('66-'70) better cores since they were designed prior to tightening emission standards?

Case in point: I have '69 and '72 4MVs. The base plates are not directly interchangeable due to design changes. Which is better to use as a core assuming there are no emissions issues in my state?

Thanks,
Joe M.

[Schurkey]

Personally, I'd want a newer one--'76 and up (at least up to the point where the computer controlled the carb, anyway.)  Of course, choke style, throttle lever, and fuel inlet considerations must be accounted for.

Of those two, I'd still take the newer one--unless there's some reason to think the older one has less damage, or somesuch.

IF (big IF) the choke, throttle lever, vacuum nipples, etc aren't an issue--newer is pretty much always better except for the '75s with the goofy APT