Thanks for the replies guys.
My truck is actually using the S366 that was on Keiths truck I beleive which Justin then sold me. Only thing missing from my truck is a capable pump, im on a maxed stocker, but it still slips my Luk in 3rd and upwards at 3/4 throttle, and it totally feels like you pushed the clutch in when you go WOT. This is at 22lbs of boost.

OK so consensus is that we can drill the flywheel. The machine shop at work here is very good and accurate. I will have them do it.

Now the question is-do I want the PSD Luk Cerametallic clutch? Or can I go less aggressive since I am gaining diameter?

go with the organic PSD 13" Luk 07154 for $163
or
MPACT steel back? M-PACT 07153SB for $214
or
SACHS for $250?
or Luk cerametallic for $329??

Local shop will machine my old Luk SMF for $50

 

Interesting, found this on a Schaeffer document from LuK

"
LuK cerametallic discs are designed to handle the punishment
of heavy-duty, high-torque applications and commercial use.
The new design features a unique cushioning system, which
provides a smooth vehicle launch with all of the torque-
transmitting advantages of cerametallic facings"



http://www.schaeffler.com/remotemedi..._172_us_us.pdf



I think ill spring the extra 100$ and go cerametallic..
by the cushioning system I assume it just means it is a sprung disc which does allow some torsional deflection, rather thana race solid flywheel and unsprung puck ceramic setup would be like.
LuK tech support said the cerametallic is rated at 1000 ft lbs, the organic 07-154 is rated at 650.