True that my pressure readings on under hood gauge are very likely inaccurate. I am familiar with the error that liquid filled fuel pressure gauges present when heated.
This is a 550 hp w2 head 408, the issue only occurs when ambient air temps are very hot, like 80 plus degrees. There is no issue when temps are cooler. Lines are several inches away from TTI headers at lower portion of engine compartment. The insulation on line to pump through engine compartment helped. To some degree I was Jonesing for an electric in tank setup, this might have been the final excuse to prompt the change. In the event of a change to EFi down the road, my fuel system will be ready.
