Ok so i got a set of CTR Pistons n i have a GSR motor....SO i was talkin to someone at a car show sayin that i planed on puttin the CTR's in with out upgradeing my Vavle train he said well then ure not gonna have enought clearance....SO i my question is what kinda problems am i gonna have if i do put the pistons in....what kinda things am i gonna have to do in order to make the thing run right..????