[tommott]

Thanks all for the responses. I've narrowed the issue down to either a fuel pump that goes out after warming up or a clog in the fuel tank.

I put a fuel pressure gauge in front of the offending carb. Upon start up the fuel pressure was reading around 4.5 lbs. Drove the car for a good 10 minutes, the farthest its made up until this point though I was much less aggressive on the throttle, and the car ran reasonably well. Pulled into the garage and the fuel pressure was reading just about 0. The gauge never read that low, even when not installed. Shortly thereafter the car puttered out and died, not sure if it was good timing on my part, or if the car sitting stagnant running had something to do with the loss of pressure. Within a minute of the car puttering out and dying on me I restarted it and it was instantaneously back up around 4.5 lbs of fuel pressure.

I have taken the fuel pump off and will be inspecting/testing it out later today. My hunch now is leaning more towards a clogged pickup in the fuel tank. If the fuel pump was losing power as it got hot it seems somewhat implausible that it would right itself after cooling down for only a matter of seconds. The pump in question is one of the red Holley deals.....I'm half tempted to throw on one of those cheaper Mr. Gasket pumps and seeing of that makes a difference as well.

I'm now thinking that it is more likely that a bunch of crap is in the gas tank floating around and as pressure builds in the tank the fuel pump slowly pulls the crap down to the tank's pickup. As soon as pressure is relived, ie the car being shut off, the crap then floats back off the pickup line.

Now this is all conjecture at this point as I am not familiar with the innards of a 914 fuel tank. Not sure if there is a sock-like filter, like what is found on a 911 tank, that could capture this type of crud. I'll guess I'll have to do some research over on the 914 forum or bounce over to 914 world, and culminate the tests on the fuel pump, prior to popping the tank out.