Hello, I have a 1985 Chevy K5 blazer and a 1983 K20. The Blazer, bought in 2004 while I was in the Marines on leave. Did have a 305 which I did convert to a 5.3 out of a wrecked 2003 Chevy truck in late 2007. The 305 was smoking good and using oil. Was going do the swap after coming home from my...