My buddy has a 1991 Mustang LX that has a 1995 Bronco motor that has been Stroked & Bored out to a 396 C.I. It has Forged Probe connecting rods & Pistons, Forged Eagle Crank, Roush Heads, 1.7 Roller Rockers, F303 Camshaft, C&L cai & Mass air, Professional Products Typhoon intake and Throttle Body, 30 LB injectors, BBK adjustable Fuel Pressure regulator and mabe some other things I forgot. Oh and it supposedly has the 95 computer from the Bronco. The Problem is that under hard acceleration it starts to miss or stumble but only under hard acceleration if your driving normal it never dose it. We talked to a friend who teaches a Automotive class but he is more of a chevy guy so he didn't know much of the problem but he said it was most likely a ignition problem, I can't remember the name of it but it has to do with setting the timing but anyway he took that out and said take it for a test drive and while on the drive it seamed to stumble a lot less than when it was pluged in. then he also look up the Fuel Pressure for a 95 Bronco w/351W and said it was supposed to be around 35-45 and the car was set at 30 so we bumped it up to 40 and it still stumbles. Dose anybody has an idea what the problem could be???