harry,check the salvage yards and keep a good eye out when you are driving through the farm and ranch land for 1968-1972 3/4 and or 1ton GMC's and Chevy trucks espicaly ones with an auto transmission. there's a good chance it will have a 4.10/4.11 pupkin in there and maybe you might hit the gold mine and get a 3.73 or a 3.08 pupkin, those two are really hard to come across. the swap is really easy.
tony'n weatherfor(1010 kilometers to you east} just doesn't sound right.
