Advice on heads,
ok i am looking at 2 sets of heads for the 400 I will be building. the two set are as follows;
1971, K73, 96cc chambers with 2.11/1.77 size valves
1973, 4x(3H), 98.21 chamber with 2.11/1.66 size valves
As far as i can see the only difference is the size of the exhaust valve. My intention is to build the engine to 350-400 hp. will the exhaust valve size be a major factor. The 4x heads are a couple hundred dollar cheaper and would like to save the cash.
Thanks in advance for any help,
RB