Ahhhh, a smoking stroker

Are you looking to drive it on the street a lot? Is that why the 210's? GREAT heads, I have 2 motors with them. (one overly tweeked set of rolled over 55cc, CNC monsters, and 1 set of RR's out of the box) Love them on the street. But with that much cu. in.,, I'd sure think about the 220's if you can tolerate the shaft rocker system to get the geometry straightened out. AFR is a FINE head, any way you slice it!