man that write up was harder to find than i thought. you should put this back in your sig stock87 lol. but you can adjust the odo, pretty simple.

Stock87's SR5 Cluster Writeup

87 22R PU, 2? body lift, 33? BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.