What my plan is, is to use a couple of long hose clamps and clamp the idler gear in between the cam and crank gears with the .003" feeler gauge between them all. Then, use the idler gear pinion as a guide to drill a hole through the front of the block foe a 3/8-24 bolt to bolt the idler gear in place. I believe that will work. It's goin to dammit. lol
