G Force Performance Products GF-EJ-LS-DIY Swap Block Mock-Up GM GEN III/IV LS

Swap Block Mock-Up Engine Long Block, 1997-2020 GM GEN III/IV LS Engine Replica, Accurate & Rigid Representation of Actual Engine Block, Durable Steel Construction, Unique Tab-and-Slot Design, Resists Welding Heat, Includes Hardware|G Force Performance Products GF-EJ-LS-DIY Swap Block Mock-Up GM GEN III/IV LS Engine Long Block.