
LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods …
2018/3/8· The LM7 (along with its L59 FlexFuel E85-capable brother) are the Gen. III, 5.3L iron block truck engines you can pick up in wrecking yards for about $600. There were a couple key areas where the LM7 excelled: 1. It makes sense for …