OK I should be a couple weeks away from actually doing this. My 73 K20 has a 383 TH350 NP205. Im gonna swap in a rebuilt 700R4 4x4 tranny. So I buy this adapter/spacer for about $50 and then trim the tailshaft on the tranny 1/8th inch?? Is this right?? Also what should I use to cut the tailshaft without ruining it? And I'm expecting to have to shorten/lengthen driveshafts, move crossmember back, and probly make room in floorboard to move back T-case shifter. Ive searched here on CK5, but is there a good write up on this? Also am I missing anything here? I like to do alot of reading, research and get as much info as I can so there wont be any surprises. Thanks!!