There's a few different "50 series".... there's the 50 Series Big Block, Super 50 Series, 50 Series Delta Flow and 50 Series HD, 50 series 4x8, 50 series 3x10..... Do you know which PN you got?

You'll be alright without the bellyskid. My friend doesn't have it on his WK yet either and has been there the past 3 times with me. I'll let you know what trails to avoid.