There is another way to use an LS series engine in our trucks:

Edelbrock and GM performance BOTH make kits and aprts to allow running an LS series engine with a carburetor and conventional Performer or Victor Jr intake. This approach retains the indiviudal coil packs and camshaft and crankshaft sensors, and adds an MSD-sourced ingition kit that incldues a blackbox (red, actually) and wiring connectors, that fires the plugs.

The whole setup can be made to look somewhat retro, and seems to cost between $800 and $1300 depending on choices made.

This is apaprently EASY compared to trying to reproduce all the external wiring and sensors needed to support the fule injection.

The resutling engine makes identical or better oeak power than the injected version, but I'm sure the fuel mileage will be inferior to fuel injection.

Jim G