timing gears replacement....one question

For installation, just get 2 bolts, 3/4"x16TPI, and get one that as 2.5" long and one that is 2" long. Or stack some washers under the 2.5" long one after the balancer is almost pulled in. A 2.5" bolt will bottom out in the crank threads before the damper is all the way pulled in, but you need one that long to catch enough crank threads to get it started .