buying, shipping accross country and stuffing in my 85' 635. Can you guys provide some knowledge and guidance on this. The guy wants $900, it has 136k mi on it. Comes w/ everything, ECU, harness, oil lines, intercooler, oil cooler etc. Does anyone have any info on this block. He says it's oil cooled. What pitfalls or problems do I need to be aware of if I swap motors?85'635 5sp WIP