yea the blocks are identical and the oil squirters are virtually the same except they are angled differently. the TT has check valves where the NA does not. craknshaft, connecting rods, piston rings, cams, lifters valve springs etc are all the same. the oil squirters, heads, oil pan and pistons are really the major changes. my biggest challenge is finding someone i can trust and knows Zs who will do this. any advice would be a huge help