Someone here is on drugs.
Number One: if Detroit Diesel Reliabilt parts carry a One Year Warranty as opposed to the New Parts Six Month Warrantee for New Parts (when they were making them, if they still are), what does that say about quality?
Number Two: The engine option for the B50 was the 10-cylinder MAN @820 HP: lighter weight, more HP.
Number Three: Price out the replacement engine package and multiply by TWO (yes, TWO) to approximate the final repower cost.
Number Four: Gold Coast sells re-man'ed Detroits.
A Distant Number Five: there is a lot of crap advice tendered on these threads.
Good luck, Daveed.