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| | Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal (Site not responding. Last check: 2007-09-26) |
 | | The Iron Duke (also called the 2500, 151, Pontiac 2.5, Cross Flow, and Tech IV, though the decal on the air filter assemblies actually reads "4 Tech") was a 2.5 L (151 in³) I4 piston engine. |
 | | This 151 was also used by American Motors (AMC) starting in 1979, as the base engine option in the RWD Spirit and Concord, as well as in the AWD (4x4) Eagle models through the 1983 model year. |
 | | The engine was updated one final time the next year with balance shafts, new pistons, rods, crankshaft, and an in-pan oiling system. |
| www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=GM_2500_engine (434 words) |
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