[rms427]

As far as HP my 428 turned a best of 12.4 at 112 mph back in 1970. The only changes from stock were Dunlop rain race tires, side exhaust, 3310 holley carb and dual point distributor. I used the car as my everyday car. I put around 48,000 miles on the car the first 4 years I had it. The only problems I had with the car were the front ball joints failed and it overheated until I added a second small fan. The ball joint fix was adding zirk fittings.

The SC Cobras turned around 12.20 with Goodyear road race tires so my car wasn't that far off. I also got about 15.5 mpg. I now get between 10 and 12 mpg with a medium riser 427. The only time I ran the car with the 427 I turned 12.6 at 113 mph. However it was 95 degrees and 95 % humidity so it's not a good comparison as the 12.4 was probably at around 50 degrees.