DZZ71
"Living The 6.5 Dream"
I have a 599 with some cracking around the bolt holes and a broken starter bolt hole that is fixable. Next is a 141 with no cracks or defects that i could see over the many times i went over it. That block was a pull out from a 1997 1 tun it also has squirters 301,000km. Last is my 506 It was a brand new GM long block installed in 2001 over a warrentee claim the owner told me. It has about 340,000km on it. Im not sure on the cracking issue on the 506 i havent stripped it down yet. The goal is to get as much power as possible. So what would be the best one to hold up? I can post pics if requested.