LS1 engine - price suggestions

[Frenchy]

Ah well ok, I suggest you read the sticky on the swap. But being a 99 it's fairly straight forward. Get a 99-02 harness, appropriate mounts, all your accessories, lines, hoses etc. Best thing to do is find a wrecked truck and take everything in the engine bay. What motor you use is up to you, 4.8/5.3/5.7/6.0 are all the same engine family. Me personally would go with a 6.0, either version would be good. Reason being is cost, your ACTUAL LS motors will cost an arm and a leg. A decent cam and heads on a 6.0 will outperform your LS1 and LS6 and still be a lot cheaper.