Help! long track on 03 rx1 121

I have an 03 rxi 121 I want to do long track. i am installing turbo kit very soon!! tracks usa said they coud only to 144 and 1.5 paddle , i would like to go bigger both ways . sled is bone stock yet, but measured lug at almost 1.5 seems to have .25inch to cooler pertecter by bulkhead sprocket area. if i take out cooler protecter looks like i would gain another .75inch stock 9 tooth guessing i could gain on that?? i dont know!! wondering what is the best way to go, and what works the best? what skids fit? thinking about 162 with 2.25 but maybe dreaming? IKNOW YOU GUYS KNOW STUFF!! Thanks