[effvee]

Originally Posted by john_cramer

2,0 heads are just about the worst choice from a performance vs. dollars standpoint. Stock, they have 39/35 valves and wheezy little 32mm ports.

Sure, they can be CNC ported and have larger valves installed to resemble 69S heads, but you won't have much change from a $10,000 bill AND the heads will be more prone to detonation than later heads. Also you will have to have the mating surface cut, 84mm and later cylinders have a different seal that requires irreversible modification of the sealing surface of the heads. (but there is an adapter to go back).

There are no later 2,0 heads with the shallow combustion chamber-- all the early ones have a 72cc chamber and different valve angle. In 1970 the combustion chamber was revised, 68cc, and the valves were made larger.

What you probably want are a set of 2,7 heads that will work better with 90mm cylinders. They aren't that hard to find or particularly expensive. Good luck!

Alright then, thank you very much