I put an Xtra-10 in to an 89 indy 400 liquid this last fall. I tried everyone elses measurements, and ended up with something all together different for myself. Use JB's as a reference, then take all factors into consideration. His is a good template, however for what I was looking for I used my own. Only reason I say this is cause when I used measurements from templates that I found on line my track was too tight even with the tensioners all the way loose. Keep in mind my rear skid was from a 2002 XCR 800 from the agressive chasis. perhaps my 89 chasis is different, or maybe the rear skid is not the same as a regular Xtra 10. Anyway just thought I would share. Any knowledge or input is appreciated. Also if you want any more pix of the finished product, or my measurments let me know.