Harold what is the Lobe Separation Angle of the XE262 cam? I was looking at the XE268 some time ago and thought the LSA for these cams was 106 degrees?
I ended up going with the Summit #2802, but what is interesting about the 2801 or 2802 is that the LSA is 114 degrees. When I ran my dynamic CR with the 2802 the cam allowed me to bleed off enough compression that the cylinder pressures peak at around 170-175psi, which from what I understand is optimal and at the top end.
With a tighter LSA you will have higher compression and more likening to detonate - more time to build pressure. I would look into this further - not taking anything away from all the great feedback so far.