AMG/GEP 506 Navistar Longblock ID

[okadoc]

If it doesn't have the cast-iron girdle, it's NOT a P400.

A pic of the valley with 506

[More Power]

That does look like a P400... likely a drop-in for a HMMWV.

The heads may have the vertical mounting flanges for the HMMWV intake manifold, which won't work for a pickup truck/Suburban intake. If you can use the rear mounted turbo, you're golden.

Thanks for posting the pic.

Jim