Is there any way around using a single mass fly wheel with their clutch pack? Carquest has a standard clutch kit with the fly wheel, disk, plate, and bearings for 600$. I was looking to have a iron caramic button clutch by a company in memphis for $250 and its under warranty to never fail. Do the old 6.9 and 7.3 run a single mass or are they all dual mass? I can prob find one at a junkyard if i know what years to look for.