[Walt Fricke]

My thought too - maybe it is starting on the cold start valve's contribution, which is designed to be short lived.

You could disconnect the red/black wire on the thermo time switch to disable the CSV, and see if it even coughs when you try to start.

Time to acquire the system/control pressure checking gauge stuff and see what you have for cold control pressures, and for system pressure.

Another check: disable the fuel pump safety feature by pulling the plug off from behind the right side of the intake. This will allow the fuel pump to run as soon as the ignition is turned to the on position. Pull an injector and stick it into a bottle. Key on, lift the sensor and watch what comes out of the injector. It should flow.

If it does, and the pressures are reasonable, maybe the mixture screw is way out of whack? Hunting around on posts on CIS should lead you to some ways of setting the mixture screw to ballpark before you even try to start, I think I recall.

You can get a remote starter from a FLAPS for peanuts so you can be back there, but why? The pedal will blip the throttle just fine. Granted, adjusting the idle screw is better with a running engine.

I take it that you can't keep it going with the throttle? If you can, then it's not a CSV only fuel issue, but more likely a fuel quantity adjustment issue.

Your larger displacement means more fuel needed, but I'd not think that at idle that would be enough that with the throttle cracked it wouldn't keep running. And your cam you say worked with the stock ps and cs, so it ought not to be an issue.