I have a built 2.4 seven bolt with Eagle rods and Ross pistons and I still wish I just would have gone with the 6. The damn thing makes me nervous everytime I hear any odd noise. It's just not worth the risk. Mine is still running but so far it's only seen a stock clutch (12.5 quater mile with it) and an HKS twin disk. My HKS gave me problems. Besides being a bitch to install, I was never able to get it adjusted between not disengaging enough and having pedal pump up. Eventually some how I managed to snap 3 of the 6 flywheel studs.
I'm now in the process of intalling a Horse Power freaks feramic disk with an ACT 2100.
My HKS clutch may still be usable if you buy some replacement studs and/or a rebuild kit. The disks didn't seem to have any problems before the studs broke but I'm no expert just looking at it. If you want to take a risk I'll sell what I have for $100. I'm to fed up with it to give it another try.