...as of several months ago (minimum), the shop that did head work for SZ, no longer does it. Not economically feasible. They mostly CNC machine heads for American Muscle cars. CNC machining vs. hand-porting Z32 heads. Huge time savings. Not to mention loads more customers vs. the few Z owners that request head work. SZ is likely not an option anymore unless Greg has a different contractor since I last spoke to him a couple of months ago.