i HAVE A 95 F150 I JUST BOUGHT. NEEDS A LITTLE WORK. MAIN THING I NOTICE IS AT FULL THROTTLE POWER IS GREAT UNTIL ABOUT 4K RPM. ALMOST FEELS LIKE AN EXHAUST RESTRICTION. BUT THEN AGAIN I DO HAVE A 93 MUSTANG THAT IS A TOTALLY DIFFERENT FEEL THAT IM USED TO. IS THE SLUGGISH FEELING JUST BECAUSE ITS A TRUCK AND NOT A STRRET MACHINE? IM IN THE PROCESS OF GETTING HEADERS AND POSSIBLY A SET OF GT40 HEADS. CORRECT ME IF IM WRONG, BUT DOESNT THIS 5.8 HAVE MUSTANG E7 HEADS?

 

At about 3500 RPM that 351 is probably about out of breath. Then again the one in my '92 E150 pulled HARD until redline.

 

At 4k with stock parts, its out of breath. It isn't meant to be run that high.

 

OK THANKS GUYS