Hey guys, The kid that owned the truck before me put some cheap get me by clucth in my truck before he sold it to me so my clutch is going out on my and its only got 15,xxx miles on it

I got the mods in my sig and tow a couple times a month nothing to heavy but I plan on putting some stage 2/hybrids in and a van turbo so im gonna be hitting 400-450hp this summer.
Im sure its the original fly wheel so I might as well go with the Southbend ConOFE clucth kit rated @450hp or 500hp whatever it is that comes with the fly wheel and everything. Can a Southbend vendor please PM your best price for the whole kit I will be purchasing it this week. Thank you.
Also should I do the slavr cyilinder to while I have it out. I cant remember if it is internel? thanks