[JRSully]

Have spoke to the experts but figured I would get as many opionions out there as possible. My 70 L78 Nova has developed poor idling/stalling traits after driving it for 15-20 minutes or so. Specs: dead stock L78, except for headers and recurved distrib 11:1, orig Holley, 569 intake, heads, cam. One change I made recently was to swap the intake gasket to allow the heat cross over to function (stock set up) previous gasket blocked it (I wanted to now use the stock choke stove set up) That seems to be when the problem started. It will run fine until it gets warm and runs about 180-185 with no overheating issues. Once warm it will slowly die/stall out at idle and I will have to "feather it" to keep it going etc. When I first start it and drive it it idles fine
First inclination is that the fuel is getting "boiled' after it is warm as the intake itself is hotter now with the heat crossover and the general "flat design of the 569 intake". I have moved the fuel line away from the headers so I don't think that is an issue. I beleive that if I install the 70 factory Holley heat insulator plate uner the carb (do these things even work.?), that will cool the fuel bowls and also install also a 160 thermostat, that will cool the engine itself, hopefully that will cure the problem. Any opions are welcome, Thx for the tips Eric as well. SULLY