I have read about swapping the TH 350 with a 700R4 and using an adapter to bolt to the NP205. Where do I get this adapter?? The parts from Advance Adapters to do this seem a bit more pricey compared to what Ive read. I have a rebuilt 700R4 in a 86 Blazer I would like to use in my 73 K20 and would like as much info as I can get. The info I got about this was from old postings here on colorado K5 from a couple years ago. Thanks guys!!!