I've started the process of replacing my Clutch. My truck is an 01 2500 with a 6-speed. I think its the NV5600. As of now I don't have any upgrades done to the motor. However I plan on adding up to 120 horsepower and 350lbs of torque. What type of clutch should I go with SouthBend or Valair?

 

you plan on adding huh?

What you plan on now and what you end up adding later are usually two very different things.

South Bend and Valair are BOTH great companies to deal with and BOTH have high quality clutches and excellent customer service.

Go with whichever is cheaper at the time of purchase for the clutch load/type you are looking for.

I have a south bend 3600 double disc street clutch with HD hydraulics.

 

I went with Valair double disc. Both seem to be pretty good products though. Go bigger than what you think you need because when you start adding hp/torque and you don't have a big enough clutch you're gonna regret it. Like Jigabop mentioned, go ahead and upgrade your hydraulics while you are underneath there.

 

What's the benefit of upgraded hydraulics, is it needed or does it just make stepping on the clutch easier?

 

both.

they are needed for higher pressure plate loads as the stock hydraulics were not meant to push on higher pressure loads.

they do also make the pedal easier to press down. it comes as a complete sealed set that is already filled and bled.

so you basically replace the reservoir, master, slave, and line between them.

 

I'm not building a street truck. On occasion I'll pull up to 10,000lbs. Mostly pull an aluminum fishing boat loaded with camp gear. I read somewhere that a dual disk would be better for pulling heavier loads. Should I consider a dual disk?

 

I've decided on a South Bend 1947-OR-HD. I talked to a tech at Alligator Performance and he suggested I replace the flywheel as well. My flywheel is not in bad shape. Do I need to replace it or can I just have it turned?

 

turned if not bad and clutch works with it...

with dual disc the flywheel comes with the clutch as it is a special flywheel for dual disc clutches.