I'm going to replace my w2 340....its been a long time since wrenching it..when it comes to gen3 I'm clueless...my powerwagon runs fine so I never had to work on it.. 5.7 gen3....I'm looking to put together a engine 900-1000hp for my 69 swinger......procharger.....what's needed to achieve close to that HP in a gen3.....I threw this around in other forums here also...