Well, it's funny how things work out. The frustration of trying to find a good engine is over. (I hope). I work 3 days a week for Ford, and they sell factory authorized AER remanufactured engines . AER also sells factory authorized Chrysler and GM engines. I called them today and with my business license they'll sell to me direct wholesale. This afternoon a customer came in and wanted to know if I would be interested in a core 6.0 LQ4 that was running when removed. He wants $200, but if I buy an engine from AER there's a $300 core charge. That will save me $100. So, it looks like I'll be ordering a 6.0 like I initially planned! Pretty excited about this. I was thinking with a 5.3 I would need to regear to 4.11, but with the 6.0 I think the existing 3.73 gears will be fine.
I'll call in the order tomorrow. Now I need to find all the externals, plus a 4L80E, and 241C case.