Changed chip in ECM. Loaded Tuner Pro RT Ver 5. Downloaded AMUR .bin file(89 GMC 5.7 700R4). Thought this was good fit as my setup is 5.7 with 700R4 in 69 Camaro. I am guessing I should use $42-1227747-V5.2.adx and $42-1227747-V5.9.3.xdf files as the $42-1227747-V3T.adx and $42-1227747-V4T.xdf look like they are for Turbo 400 and 3 speeds. I am sure this is the first of many questions. Thanks for the help, Steve.