You going for the h92 instead of the h89?
I would like to do the same but I thought the
h95 was the only swirly high port big valve head
so the 92 is also the same or are there differences
in compression?
I think the cc wouldnt matter here if the pistons
are the same as those on most h89 headed engines.
You are unlikely to go over 10:1 with stock heads.