390 w/open chamber heads

moper, my apologies for improper word choice/combination. By zero decking, I mistakenly referred to decking the block to blueprint height as measured off the mains to 9.6" I understand the difference between, and humbly apologize for the lack of clarity.

Again, not poking here, and maybe I read the text incorrectly, but in post #43, you stated that you totally disagree with square decking the block, yet in your most recent reply, you say it's important to maintain proper tolerances and geometry...