Here is a good link on cam basics.......http://www.popularhotrodding.com/tec...selection.html ....This is link directly to the section on LCA ......There is more to it than a straight forward X=Y type caulculation,meaning just the static compression ratio is not enuff.....The heads /roller rockers at 1.6 and intake valve sizing ,vehichle weight,etc all come into play for cam sizing.
He has 1.6 rockers ,meaning the actual engine duration is larger than the advertised cam duration,also the LCA has alot to do with it too, ,meaning a cam with alot less than 250 can be used in this situation.
Erik has folowed along with this entire build ,which goes many posts deeper than this one,he knows which heads ,what works been done to them,vehichle type ,tire size ,gear ratio,weight and intended usage and specific internal parts that are not listed in this post.
I would not be soo quick to wheel out a parts suggestion,when its someone elses money and fun at stake,unless I was 100 percent shure it was exactly what was needed ,not something that will work,especially when someone else has already given good information.