So to answer the question...I bought a 2800 advance clutch to put me in the 5.90's solid instead of the 6.0's...It weighs about 4-5# less than my single 10" clutch..
80 AMX Barry Allen 420 AMC Iron Heads Jerico 4-speed Advanced clutch 2950# street legal
5.97 115.73 Coles county dragway 10/28/07
9.42 142.96 best in 08(6.00 115.8 1/8)
5.97 116.2 in 09
http://www.youtube.com/watch?v=AXSr201-tmA