Nine inch clutch sources ?

I have a 66 Formula S four speed that is going to get a mild performance build, around 300hp, is there a replacement clutch available that will hold up to the hp requirements and fit inside the stock 9" bellhouse?

I just bought a 9.5" clutch kit from Brewer's Performance in Ohio. It fits the stock 9" bellhousing and they supply special bolts to make this happen. It pulls real good in my 65 barracuda with a mildly built 318.
Brewer's is in many of the popular mopar magazines and easy to find online.
Tell Wayne that P.Daniel Clark sent you. He should remember me.
Good luck. They also sell any hardware you might need for your clutch and shifter. I have an extra lower bellhousing cover for sale if you need one. They are kind of hard to find. If yours is lost or missing for some reason, let me know.