Block cutting, specific to ISX/X

[dericson]

What’s happening folks.

Have an odd question that I think I’m overthinking. Typically cut counterbores on midrange blocks. Have a buddy looking to cut his x15 block. I’m not looking on advice on the hot topic about brass vs ss shims. But I was recently talking to a guy and he said he adds a ss shim to the bottom of a captive shim factory installed on the liner (the one with the tangs that point downwards. Book says factory installed captive shims and a service shim can’t be used together I thought. He brainf*cked me on that one. I’ve heard of stacking service shims but never captive/brass or ss shims together. I know big bore and small bore liners either have a factory captive shim or do not. Thoughts?