Swap Block Mock Up LS Engine Block GF-EJ-LS-DIY voltage-regulators 7L V8 1966 Mercury Monterey

7L V8 1966 Mercury Monterey S-55 428/7

Part Number: 817658

1970-1974 GMC Jimmy

1971-1972 Chevrolet Monte Carlo 400 CID

6 V8 1975 Chevrolet Laguna 350/5

Swap Block Mock Up LS Engine Block GF-EJ-LS-DIY voltage-regulators 7L V8 1966 Mercury MontereyThe ORIGINAL Lightweight Steel LS Swap Block?? Engine: Gen III LS, Gen IV LS Years: 1997 2020 Our patent pending? swap block uses our unique tab and slot design to provide accurate mounting positions of engine accessories and bolt ons. This? distinctive design is lightweight and comes disassembled for ease of shipping and storage. Precision formed returns on all weight bearing components and tight tolerance slots create a rigid and accurate