[Bobcat]

The 427 was available in two stages ... Q code and R code . The Q code was a single 4 bbl version and was factory rated at 410 hp @5600 rpm and 476 ft lbs of torque @ 3400 rpm . The R code was a dual quad version rated at 425 hp @ 6000 rpm and 480 ft lbs of torque @3700 rpm .
This is one of my toys ... a 63 1/2 Galaxie 427 Q/R code depending on my mood .
According to my Ford data , the 428 CJ ... single 4 bbl rated at 735 cfm , put out 335 hp @ 5200 rpm and 440 ft lbs of torque @ 3400 rpm . They were playing with the hp ratings ( advertised ) to get around the insurance surcharges etc back then . Notice that the hp is way under the torque while it is closer on the 427 . I don`t have info on a standard 428 , but believe it is about the same ratings , however , don`t know if Shelby did anything special to the 428 .
Hope this helps .