Are you looking for competitive racing application, or backyard fun?
Huge difference.
For competition, I like the genuine Bully clutches. 2 disc 6 spring.
For back yard horsing around, I'd suggest a Noram GE series clutch (durable enough to take the abuse and last nearly forever.)
I stock both in our shop, and always have good used/fresh rebuilt Bully clutches in stock.
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Give us a call if we can be of any help.