Glad to hear from you! The Vetter fairing kit is nearing completion which could save alot of time when you are ready to work on the Ninja. Does the Grand National have a V6 and a 5spd? A rear axle from a GM V8 AT drive train would have a lower ratio. To ease the lower back pain try building up the height of the Ninja seat. Mark Martin has great book out on back muscle development for racers.
If she is worth a 52 mile commute each day, then she's worth the price of a marriage license
