[rms427]

I have copies of original spec sheets from Shelby. The 427 competition car was rated at 480 HP, The 427 street engine was rated at 425 HP and and the 428 was rated at 390 HP. However various engines and rear end gears ended up in the cars depending on what was available. The specified rear end ratio on the 428's was 3.31 but my 428 car has 3.54 gears. The specified rear gears in the comp car were 3.77 and the 427 street car specified 3.54.