Ever race an older muscle car and spank 'em?

[Rev]

Originally posted by Lazer50
67 GTA has the 390 rated at 320HP, and i have only been able to run a 15.4 @90 with it

Steven

One must remember that the 1967 rated HP figures are gross horsepower. Manufacturers now use net horsepower when rating engines. There's a fair amount of difference in gross and net.

Rev