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Thanks for the input. That is an option I must keep in mind. Here is the latest on my 240's, at least the three biggest trouble makers. Two of them needed new fuel pressure regulators. Plain and simple. Replaced them and that did the trick. Running great. Pumps quieted down. No stalls or hesitations in 96 degree heat. Thanks Brickboard! The third car issue was not the FPR, but the hose from the FPR to the throttle body. It was split and sucking air badly. Changed that out with new hose and VOILA! Thanks Brickboard for that one too. I have also taken out the flap door assembly in the airbox of two, blocked off the old inlet from the exhaust manifold piping. The flaps were permanently closed to outside air and only hot hot exhaust manifold heat was going into my engines. I may eventually buy the little thermostats and put it all back together, but for now, there seems to be happiness under the hoods, and in the driver's seat. I do love these old cars, but without Brickboard, it would be ... different.