I didn't want to highjack the 400hp combo thread but there was talk of the '61-62 tri power [email protected]. Being a 18 year old Ford fanatic, I was thrilled when I heard that the '66 Fairlane GT was going to have a 390 in it. I was very disappointed when it only had 335hp and all the 396 Chevelles in my home town would blow the doors off of the Fairlane GTs. I don't know why Ford didn't see what was coming and throw some more horsepower in their 390s. How do these two engines compare when dyno-ed on the same dyno? Realistically, what was their hp in a side by side shoot out.