It sounds to me like you need to figure out what kind of wheeler you are or what kind of wheelin you want to do. If you are just looking to get out on the trail and get up there in it, Then build the 91. You will be up there and out in it in class and comfort. Now on the other hand if you looking to got up there and wind it up tell the vavles float and dump the clutch than build something older or looking to run the sluice box. You just got to decide what exactly your looking to do in your wheeler on the trail.