GRI_Zenki

Hey guys im new to the forum and I just bought my stock 1995 240sx Zenki Base. I had some questions about doing some swaps on it. Would I need to change the calipers or brackets when doing a 5 lug swap and do I need to change anything or modify (e.i. cutting drilling welding ect) anything to get a rear sway bar installed Also when I bought the car it was 98% stock (2% is replacement muffler and rims) what do I need to do to get a little more power out of it without dropping $2K on a turbo kit. Thank you for your help