I am trying to decide between a Tremec 600 and the T-56. Does anyone have any experience with the two. I like the idea of the 6th gear but will there be too many adjustments to make. I also saw an article that claimed you can't use an X-pipe w/ the t-56 and the trans tunnel has to be hammered out to fit the bell housing. Not to mention the DS has to be shortened 3/4". Bottom line: Is it worth it to get the T-56 over the TKO600? Anyone done this? Lastly, I was happy with ratio of the 1st gear of the stock t-5 and my 3:55 rear. Is this going to change signifigantly to the point where I will have to change the rearend gear ratio? Thanks.