I've bought parts and got advice from Walt at SS Diesel Supply. He deals in just 6.5 Chevy Diesels. The 6.5 isn't a bad motor,the fuel system is lacking,if you do the modifications it can be better. I have to change my oil pressure sensor occasionally,it shuts off lift pump in a accident to prevent fuel spillage resulting in a fire,when switch malfunctions it puts a strain on the injection pump because lift pump is down.I have the heat sink relocation kit on mine for the pump mounted driver. It gets up to 18 mpg when it is running right,I need to have injectors,glow plugs replaced,the injectors should be replaced every 100 thousand miles. I have issues with mine now,changed sensor yesterday,lift pump isn't making noise with key on. I have to chase it down,could be air leak in system , I got a service engine light this time. The 95 chevy is OBD1, you can jump the diagnostic ports on the plug under dash with a paper clip to flash the codes. plowking