being it is diesel, i wonder if that is propane, that is what they use for thier "nitrous boost"
that, and a side note..ALL detroit engine HAVE TO HAVE A BLOWER, or it simply will NOT run, it is a 2 stroke diesel,and the blower is how it gets it's air to make it "normaly" asperated, they do not over boost them on normal appliations just some F.Y.I.