I have acquired a RIGID Lisle hone like the one I displayed in my original post.

As Cab Burge noted there is an adjustable nut to apply more force/pressure to the cutting stones.

The stones are 180 grit.

So far I have measured the #1 cam bearing bore in the block and it's .006 too small/under chrysler spec.

Can anyone give me a estimated time it would take to open this bore .006? 5 mins, 1 hour, 1 day of the drill motor turning the hone??

IS the block material softer than the cylinder bore material?