Wrong pistons

Okay, off at a slight tangent then but a quick look at Comp's street rollers reveals a gap - there's no XR292R, and the 286 seems a tad mild for this application.

Who's running what and what peaks are they producing rpm-wise?

Also, I'm not sure if side-stepping oil system mods is viable. Didn't Crane do a 'drop-in' Solid roller set-up a while back?