Painless 60313 Emissions Harness For Fuel Injection
Adds on to Painless 4 inch Extra Length 86-89 GM TPI Harness for 5.0L and 5.7L V8s

EPROM Chips and VATS Modules
Most 1986-89 GM 5.0L and 5.7L TPI V8's had a Vehicle Anti-Theft System (VATS) programmed into their stock EPROM. This means the engine will not run if it is transplanted into a vehicle without the original vehicle's keyed steering column. If you have one of these engines and your computer has the factory EPROM chip you will need a Painless VATS bypass module. If you have a computer without the factory EPROM, you will either need to purchase an aftermarket EPROM with VATS removed, or purchase a Painless EPROM.