When you go tighter lsa you could go with less duration keeping a similar overlap. Keeping a similar idle etc.. But you got decent size heads for the cid for the rpm you'll probably be in, I doubt your given up a lot going with a 110. Everything thing is a series of compromise, max power from a head is like 2.5 hp per cfm so most people are leaving a lot of power on the table. Where you draw the line on choices is kind of arbitrary to the individual.