Let's talk 318/349/390 strokers.

Great thread, ive been thinking about the 390 as well, ive read that because the 318 bore is so small any intake valve over 1.88 will give it a shrouding affect being so close to the cylinder wall therefore losing power or just not making what you expect with the big valve heads..so my question to you is when making the 390 does this rule still apply??