very nice...should be in ITS...re-class old z's into ITA...it would do well in ITS...give those european cars a run for it...u know they always have a advantage in SCCA. I have a GTU/GT-2 300zx which i run in HSR/SVRA...has a hard time against the porsche's which have many tech advantage's...what's the weight you must be at?????anyhow good luck...your weak link will be the engine girdle(below block) that's why Gene Crow of BSR developed the solid steel girdle (about 25lbs) it works perfect...replaces your end caps (caps are built into girdel)also sleaveing you cylinders helps to strenghen your block...and protect it should you have a rod fail...I know about that...Bill Erdman