But that is the point. As far back as the 70's, I was swapping 675 318 heads for milled J heads. We even ran OEM cast iron 340 and 360 intakes and carbs that you could get cheap. Porting off the table to keep things simple. At that point all you needed was a cam and valve springs to go real fast. A friend was running a 318 on a dirt track. 340 heads and a cam out of North Carolina. He was easily the fastest car on the track among a sea of Fords and Chevies. Never had to lift the hood either.
