Coolant leak inbetween head and block.

[mechanixrds]

Hey there guys, I am new to this forum but I have been coming to this site for information for quite some time now. I am currently working on a demandated cm871 ISX 15 that I rebuilt last October. The truck came back with just under 15,000 miles after the rebuild. As I've read on here before, and also frowned upon, aftermarket parts were used when rebuilding this engine. I used a {after-garbage} inframe kit and DCW aftermarket cylinder head. Counterbores were also addressed at that time. The truck came back for coolant in the exhaust and after further inspection I found that we had coolant coming out of #1 cylinder. I then proceeded to remove the injector and use my borescope to inspect. You can clearly see it leaking from the head and also appears to be leaking from the cylinder walls. No coolant was seen leaking from the bottom end of the motor after the pan was removed. Liner protrusion was checked after the failed cylinder head was removed and was in spec according to the service manual. I will be posting pictures and measurement spec later. A new cylinder head was installed and then put back together. As I was finishing filling it up with coolant, I noticed that I had a coolant leak on the front right side of the engine in-between the cylinder head and the block. To make a long story short, I pulled the engine and sent the block to the machine shop and had it checked out. The machine shop did not find anything wrong with the block. We did have the deck resurfaced and the counterbores reset. After the machine work, I did end up replacing two liners because I wasn't happy with the liner protrusion. Once that was satisfactory, I then proceeded with putting it back together. I installed the cylinder head and torqued it to 300 ft/lbs and let it sit overnight before applying the final 90 degrees. The final torque was done by hand instead of using an impact. After the cylinder head was torqued, I decided to pressure up the cooling system to make sure it wasn't leaking. Unfortunately, it is still leaking in the same spot.
At this point, I have checked all the head bolts(OEM) free length and used a straight edge to check the new cylinder head for any warpage. I'm at a loss for words as I can't seem to figure out why it is leaking after the block got machined. Has anyone else on here experienced this problem before? And if so, what was the cause and how was it rectified?             

I have videos but couldn't upload them due to the format. I can share them to anyone who would like to see them via a google drive link.