ISX to X15 swap headache. PLEASE HELP

[weissman379]

Hey back with an update, I decided to take the cylinder head off to see what was going on cuz it seem to crank over with no compression just like a gasoline engine with no spark plugs. it turns out the pistons had no rings at all, none. I was blown away WOW! So much for getting a good deal. The place I bought it from claims they got it from another place that went belly up. And that place put new rod and main bearings, which it does have. So they ordered replacement parts for me, including headgasket. I'm going to pop the liners out and replace the seals since I'm there. Do I need to check liner protrusion before I pull them out? should I replace all the liner shims if the counter bores look good and within specs. thanks in advance.