My RS/SS 396 gets up to ninety and cuts out like it is not getting fuel. I have installed a GM Elec Ign, new wires, new fuel filter, plugs, etc. Basically tuned it up. On the analyzer, it runs perfect. My guess at this point is fuel pump. It has a mechanical now. I am considering an elec. the prev. owner had one...i don't know what. I have been told a 100 gph is the way to go. What do you think? Any reccomendations. The engine has 75000 original miles and runs fine until you punch it or run it up into the high 80's low 90's. Oh yeah, it has a rebuilt 4 barrel that has had the bowls punched out.

Thanks

My first guess, the valves are floating.

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67 Camaro SS Conv.
70 Challenger R/T Conv.