72 Dart Swinger 3.6L Pentastar +T5

Terms of more power he can slap on a rippmods super charger made for that Jeep 3.6L with the harness and all Jeep complete it would fit under hood most likely with ease. link attached and we have one in our Jeep lots of fun! :D

2012-2014 Jeep Wrangler Supercharger System

Thats already in the plan,,lol
Phase 1 was get the 3.6L installed as is naturally aspirated. 300hp will do for a while at least.
Phase 2 Add a couple Ford EcoBoost 3.5L turbos or GM 3.6L turbos, intercooler, E85 ect.
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There are plenty of JK 3.6L running around right now with 375-400whp with a single turbo or Supercharger. That's Wheel Hp is through an auto trans, transfer case and 2 axles, so ~25-30% drivetrain loss. Crank Hp is probably closer to ~475hp. I'll take that. lol