The 302 I have has a 2bbl intake (its a good stock '71 engine with the better compression figures).
I have 2 of the autolite carbs that came stock with the engine so could use these - would there be much difference between one of these and a newer 2bbl like in the summit racing catalogue? I noticed you can get a 500cfm 2bbl - is it worth going with one of those instead (basically will it make any real difference - I'm not worried about going mad for performance with it).

 

In MHO (usually wrong) the 2 bbl autolite was a good carb, the intake manifold design makes as much difference as the carb so if you are not changing the intake (four barrel?) then the autolite would be fine.

 

...uhh...I mean carb model number questions......

Hey man...can you post the List numbers and/or the Date Code that are on the Air Horn?

It'll look something like this...

http://www.holley.com/TechService/ListNumber.asp

Anyway...post those and we can tell ya exactly WHAT that puppy is!

Ya see...between Ford/Auolite/Motorcraft/Holley....well...you get the idea......

It "could" be any number of up to EIGHT different carbs man...

Ok yea...on the drivers-side float bowl, behind the accelerator pump rod,
in RAISED numerals...there will be a number. post that one too.

It is the venturi diameter...

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GOTTA luv a truck motor...

 

This is a great way to put power into a two barrel SBF. I ran one on my 289 Mustang many years ago until I came across a factory 4 barrel intake and a 600 Holley and probably slowed it down. The 500 uses a 50cc squirter just like the big race carbs, so dont put one on for economy. Im about to clean up the 500 I have now and set it on my 351W in my panel. It will make a HUGE difference on that motor. It will also drop MPG a goodly amount I expect. Should hold me until I get the dual quads on

 

Rockher_man - the ones I have here are both motorcraft ones & look almost identical. No stamped numbers anywhere as such.
One has a very large raised '8' on the underside and FZ. Behind accelerator pump rod is
'5'.
The other one has a circular stamp on the side with a 1 and a 4 in it (similar to the date type stamps you get on C4 transmissions). Behind accelerator pump is 'I I'.

 

Old F1 - no plans to change the intake to a 4 barrel, I was told as well that the rest of the engine will probably be configured to a 2 barrel so better off sticking with that?

Lowriser - what sort of difference are we possibly looking at with mileage? Any and all info relevant is greatly helpful and appreciated!

 

never ran a comparison, but thats about a 40% increase in pump shot, I presume (50 vs 35cc?) its a proportional increase. If mileage is one of your top considerations, this carb is not the ticket. For easy horsepower on a 2v, yeah baby.

 

Might be a good option then, as I'm not intending to drive huge distances with it (and the gas mileage will be pretty poor anyway!!