I'm having this same problem (pour gas into throttle body the engine will fire and run for a few seconds then stops.) I havnt got into it much on why my injectors are not working or gettin power but will try these trouble shooting tips soon.
I picked up an OBS 89 RCSB with a blown head gasket. And just picked a good running NBS 99 RCLB with a blown rear end which I R&R'd. I want to know if anybody tried to fit the OBS cab and all sheetmetal on the NBS frame/chassis. I will use all the NBS running gear with the OBS bodywork on top...
I wana paint my blue interior light gray but not sure if it will turn out like a factory grey or what. Anybody try an int paint from dark color to a light one/