good idea, will try it. thanks!

Try taking those old glasspack mufflers off. Sounds like old fiberglass packing is loose in them and when accelerating gets wadded up by the exhaust pressure enough to suffocate the engine.

fuel line is not plugged. put a short flared fitting ling on the tank and ran new hot all the way up to the pump. ran the same.

I'm leaning towards fuel pressure and or volume now myself. I have a section of hard fuel line between the tank and pump that is original. it's steel and happens to be the lowest point in the fuel system. quite possible that it's rusted or clogged in some way where enough fuel passes to keep the bowl full at idle and low speeds, but can't keep up under higher loads. gonna try bypassing that section tonight.

I have had a similar problem also, which turned out to be a new filter would fill up with trash accumulated in the lines after running for a while.  When the engine was turned off after stumbling and quitting, I would look things over, and it would start fine, run fine for a while until the trash in the filter closed off the filter again with pressure in the line.  The sediment would settle each time the fuel flow stopped, and it would start up and run fine after the sediment settled back in the filter.  Changed the filter again, and problem went away for months, and eventually changed it again with no further issues.  Joe-JDC

JDC

I had a similar problem once and it was a bronze fuel filter in the carb behind the inlet. It would fix itself after a while. I am thinking it was a Holley, I don't have much experience with Holley, more of a Edelbrock guy. It should be easy to replace, just pull the line and fitting, I remember blowing through it thinking it was ok but it wasn't.

  Vic Correnti

Seems fuel related? A bit out there, but try running with gas cap removed. They can rust on the inside and drop flakes of rust so that they become un-vented This could cause a fuel starvation situation - B

AKA   Bob-93021

I have a clear glass inline filter between the fuel pump and carb. it's always full of clean fuel,,,but no, haven't checked pressure and volume.assumed from filter full it was good. will check tho, thanks as far as the condenser goes, the new one was NAPA, the old one was unknown, both seem to work the same. coil is new. how hot is "hot"? i can put my hand on it after running. it's hot but not burn my hand hot.

Fuel pump. Have you checked pressure and volume?


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Im thinking as above ^^^    Sound like the engine is in great condition if you have 21 Hg ..



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