[Tom Wells]

Tim,

The spacer is Edelbrock's 0.3" thick one. I already had to reduce the height of the air filter from 3" to 2-1/2" to accommodate it.

Gene,

The pressure gauge is at the carb.

The pump is in the rear, just next to the gas tank. The reg is on the firewall, well away from the exhaust (as in about a foot).

All,

One of the guys here thinks the underhood temp is the problem, as it isn't well ventilated. The carb works fine for an hour at a time on the highway; no problems. When I stop and the heat builds under the hood, the Vesuvius starts. And keeps going. The bottom of the air filter becomes way too hot to touch. And the engine compartment is pretty full!

So I'm going to do an experiment -> run without a hood for a bit, as a test.

If all works OK then I need to start to make the fake scoop into a real one, maybe open up the fake fender louvers and louver or otherwise vent the rear part of the hood.

I'll report back after the experiment.

If that doesn't work, maybe the return line could be the next experiment...

Tom