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Pretty sure you're 8 bolt; I just went through this last Nov. when I did clutch and f-wheel, as I recall '01.5 and up model year is 6 bolt (what I have) and everything before that is the 8 bolt.
Its an 8-bolt, 99.999% sure, when I did mine I had to hunt around because all everyone had was the 6 bolt ones and that doesn't work with a T-45. The 3650's have the 6 bolt and the 11" clutch instead of the 10.5" in the T-45