Hey guys just picked up a 2004 auto IS300. I’m using it to daily right now but it’s underpowered. I’ve been building N54 BMW cars for the last ten years so I’m missing boost. I need help deciding 1jz swap or NA-T this IS. I’ve read the is ecu is a pain to tune with piggybacks even at a moderate 6-9 psi. The 1jz really appeals to me as it’s 100% drop in but I’m needing a detailed write up to follow for the wiring. Has anyone here done it and can you help me out.