I think I have the brake locking up issue resolved, I drove it around for about 20 minutes and it did not give me any problems. Not sure what did it since I changed several things at once. The new master cylinder is installed. It was suggested to me that I check the clerance between the MC and the booster push rod but it was in spec. However I did adjust the pedal from in the cab of the truck quite a bit, it very possibly could have been not allowing the pedal to release pressure from the booster, causing residual pressure to build up. While I was at the parts store getting the core back on my MC I asked about new brake soft lines and they had them in stock for $12 each so I went ahead and bought / replaced those aswell. Mine looked pretty rough and they where cheap enough. I have one new caliper hard line on order to replace the one that is a little kinked, should have ordered both & still might order the other today.
I don't think it is related but might be worth mentioning that I did find another issue while swapping out the brake lines. One of my hubs is not unlocking properly so that axle was spinning the whole time. I popped the cover off and unlocked it manually, looks like I need a new hub.
Here are the new parts I installed.