I'd put my money on the firing order. Although both 351W and 302 cams are interchangable their firing order are not. To confuse the issue even more, some computerized 302s (Mercs&Crown Vics) actually used the 351W order. Pretty common mistake. The car will actually run but will not take any rpm. Once, I had a late night thrash setting my car for a day at the dragstrip. Decided to change rear gears,axles, intake, distributor, cam the night before racing(why do we do that?). Left dist installation & firing order to one of my buddies. The car actually ran ok the next morning. Drove it thru the pits not noticing. I did a burnout, staged and made it to about 3500rpm in 1st gear. Went back to the pits and found the mistake. Reset your wires and rev that sumbich!
