use the toyota axles X2
they are tough. doesent really matter whick model you go with. THE ONE THING YOU REALLY, SERIOUSLY, SERIOUSLY NEED TO KEEP IN MIND DURING THE BUILD IS GEARING!!!. AND I REALLY CANNOT EMPHASIZE THAT ENOUGH!!!
i built a trail slayer(kit from trail tough) and the achillies heel is the gearing. the track/kick transmissions are designed for the high ring and pinion gearing in the diffs, therefor to acheive high enough gearing for the larger tires you have to go to the highest gearing avail for the toyota stuff. THE PERFECT OPTION IN MY OPINION....... mate a toyota transmission and trasnfer case to the suzuki engine using a S.O.S ringer(google search) this solves all the problems.... gearing is what was engeneered for the toyota stuff(run comfortably 33-35"tires with no ring and pinion swap), slip yoaks are eliminated, the low range gearing is limitless(4.7 low range gears and the ability to stack transfer cases), and last but not least.... the toyota stuff is tough!
I wish i had thought my project a little more in detail, it would cost me a ton of $$ to go back now!!
good luck with your adventure, a toyota axle'd tracker is bad ass and can be built to drive real nice!
jason
P.S. I''m just in salem or if you want to get togeather anc chat in detail and check out what i'v done