The Truth about 318s

No clue, they did have a "premium" 318, special valves, rings, bigger cam, but the compression was lower. All my 318's ran good, run good, and will continue to run good. Even .060 in the hole, they run better than the motors of comparable size, 305/302, that is.

The power comparison, for the street, is apples to oranges between the 390, and the 360. 390 runs better than a 383/400 on the low. I just wouldn't spin a 390 7500RPM.