whats the difference between a y8, z6, and y7 bottom end. i know the y8 and z6s are vtec and the y7 is not. the reason why is because i might be purchasing a y7 full swap and making a mini-me out of it. i was just wondering if there was any noticeable differences with the bottom end. im going to be putting my z6 tranny, im after i get it ported, and fuel system w/the y7 bottom end.

 

btw, would this be better than the regular z6?