172 Tooth Flywheel in my ´68 Barracuda.

Yes, I have talked to Brewer´s before about it, and they advise me not to, but I feel it was not like it couldn't be done.
I will custom build the headers, and the clutch linkage has to be altered anyway...

Is it simply about the Ansen unit being to big or what?

Can it bee done, and would the 11" clutch and 172 tooth fly wheel work for me to have a well performing SS/B wannabe?

I of cause realize this combo probably has not been tried before, since there are a safe and easy way to do this with the Lakewood unit. Is there a problem performance wise, with the bigger clutch bay be?