Years ago when I wrenched on heavy equipment, we had a Grimmerschmidt air compressor, you know the big mobile jobsite trailer ones. Anywho, all it was was a basically stock 351w and an air tank. Had a special head over 5-6-7-8 to pump the air, and it ran on 1-2-3-4!! Factory distributor and everything. Just grounded the plug wires for 5-8. Quite impressive, it actually ran really well on 4 cylinders.
