Engine chokes out on acceleration from stop (1970 with 460 engine)

[70Tbird]

Recently my 1970 Thunderbird started choking when I accelerate rapidly from a stop (i.e., when I try to burn some rubber from the stop sign). When I accelerator moderately, it works fine, or after I get up to 15 mph, I can stomp on the gas without a problem. It is only when I hit it from a full stop. Any suggestions as to what to test? I have electronic ignition, and a 460 engine. Fuel filter? Spark plugs? Dirty carb? Other?

Thanks!

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[SABLT194]

Sounds like a lean stumble on acceleration to me. Probably a carburetor issue with the accelerator pump not giving a good shot. Is that an Autolite carb? They weren't great on quick throttle stabs.

 

[jazbo]

My new 70 seems to have elongated holes in the fuel pump linkage. They are oval and elongated instead of round even though it supposedly got a "rebuilt carb" at some point before I bought it. The oval holes do allow the pump to depress much. Anyone else seen this or is it normal?

 

[jazbo]

Correction: The oval holes don't allow the pump to depress much. Anyone else seen this or is it normal?