1.5 & 1.6 Rocker ratios - What's the diff??
The extra work and possible mistakes that come with the new choices of valve springs a d the new lift and the clearances that come with it and its just not the pushrod area I'm talking about here just simpley make the 1.5 a easier set up.
Tony was right about much of what he said but it also over looks possibilities and problems. You yourself (thread starter) have a unknown amount of skill and knowledge behind what your doing. If I made a error, consider it on the side of caution. I'd rather be safe than sorry in my advice. The KISS method is best when your dealing with unknowns. Your abilty level is one of them. No offense intended.