Ken
I meant to say the only real solution is the conversion.
There could be other things that might be causing yours to die prematurly.
I'm old school and don't really take to computers,we are just wired different,the one thing i looked for when i bought the 98 was the manual so i could do the swap.
a5150nut has some good items to check if you havn't yet.
Good luck
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews