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6.5 Diesel Block Identification (moved from navistar thread)
I have a block with GM in the lifter valley and on the main caps, the 1255506 casting number on the bell flange, and 506 on the back of the block, but no Navistar diamond and no 506 in dots in the valley. For those who see a lot of chinese/AMG blocks, what do I most likely have?
It's crack-free, looks beefier with the thicker taller main bearing caps etc., just want to be sure before I pour a lot of money into a buildup . . . .
1982 GMC Sierra Grande Camper Special
6.5TD: ARP head studs, DSG girdle kit, DB2 turned up 1/8th, '97 Cummins intercooler, custom 3" downpipe to 4" straight exhaust, wastegate @12psi, boost and pyrometer, NV4500 with mech. clutch, twin-sticked NP205, D60 front/D70HD DRW with 4.10 gears, '93 serpentine belt setup
in progress
1997 Chev Express G3500
6.5TD 15 passenger van
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