Don't get too excited yet but as this was an airforce truck theres a good chance the engine has been replaced sometime during it's life time. That could well mean you might already have an Optimizer.
When you recieve the engine, check the area under the intake for the tell tail double diamond casting mark, indicating an AMG engine.
Bill
91 Buick Roadmaster/Avant 6.2 NA conversion (gone but not forgotten)
94 Cadillac Fleetwood (sold)
08 Aerolight 23TT
06 Vortec Max Silverado CC SB (sold)
10 Avalanche (electronic quagmire but love the truck)
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