I see that the M6907 is 120 gph and the M4690 I used is only 40 gph. Maybe that’s it. Man I’d hate to have to change fuel pumps. Used helicoils in the timing cover fuel pump holes and skeered they will back out. Can’t imagine this stock 350 needing more than that stock pump can handle. It’s a new replacement fuel tank that was done before I got the car but I can’t assume the fuel sender-pickup is also a replacement. Sounds like another project…after all it is my “retirement project vehicle “.
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