I stuck a set of 60G's in my donor 6.2 this week. I rigged up a harness to see if the engine would start. I fired up the plugs for 10 seconds and she just cranked, no start. I left it alone for awhile and came back and fired them up for 15 seconds and she fired right up. I think I'll rig up an adjustable time delay relay with a tell-tale light on it when I put it in my Blazer. Also, it's a J engine 82 one ton non-EGR so I'm pretty pleased.