Aftermarket Clutch

[ColtPrice6.4]

I have a 2008 single axel F-350 6.4 with a 6-speed manual in it and I am in the market for an aftermarket clutch. I live here in Mineral Wells, Texas, where Valair Clutch is headed out of and the clutches are manufactured so naturally they are one of my choices. The other choice is South Bend Clutch also, which I have heard nothing bad about except their prices.
I have a good price in a Valair dual disk, but my problem is this, I was told that an aftermarket clutch will not go back into the stock bell housing without some sort of modification or complete replacement with another. Any truth to this?
South Bend assured me that their clutch will go into the stock housing with no problem, but their price for a dual disk is about 1,800+. Whereas with Valair I'm look at about 1,500.
Any input will be greatly appreciated and if any other 6.4 drivers have had a manual with an aftermarket clutch with input on the matter with also be worth their words in gold for me. Thank you very much.

[BB's 250]

Call Peter at South Bend. South bend is the way to go. I have never ran a valair but a few of my buddys have and they weren't worth a **** compared to my sb dd 3250. They would not hold what they should have and they were quite a bit louder than my south bend as well. I had a solid 500 hp 07 goat and it would not slip on 3 rd gear 4x4 20 psi boosted launches. Some things you truly get what you pay for.

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[ColtPrice6.4]

Peter was who I talked to. He pretty much had me convinced, I was just doin my research. I have had buddies that ran both and I have heard pros and cons of each.

[BB's 250]

Yeah Peter is one of the owners, he handles the clutches on the truck side. When I bought mine it came with an sfi certificate or something for sled pulling, and after that they came out with some non sfi rated clutches that where quite a bit cheaper.
Look up armstrong performance. He is in san antonio, his name is Bodie. He had some good deals on sb.

[ColtPrice6.4]

The no SFI material is nodular iron, strong stuff but more likely to come apart if spun at higher rpms than its rated for. Makes a good street clutch but not legal for sled pulling. Im gonna go billet so I don't have to worry about that stuff.

[tensixniner]

Crawl underneath and have a look at your transmission.
Your not going to be able to run a different bellhousing if the clutch you buy doesn't fit as the bellhousing and case are integrated.
AFIK all of the South Bend clutches for the 6.4L are direct replacement, no modification required.

South Bend recently announced a new ceramic/organic friction combo for dual disc clutches that looks interesting.

A dual disc is expensive. One nice thing about South Bend is that they can rebuild your clutch to new when needed for relatively cheap (~$700).

I have a South Bend, no experience with Valair.

[BB's 250]

South Bend for sure..

[ColtPrice6.4]

Does south bend make a single disc for the 6.4? And if so what are the HP ratings for it?