Speaking of starter/header clearance issues; I went to get a new starter for my 200 as I was planning on installing a header (not going to happen now as they're outta stock) and did not want to deal with a starter going bad once the header was on. I ordered a starter for a 200, and it was noticeably bigger than the original starter from my former 170/3 speed combo. Turns out that the 170 starter is about one inch shorter, and about 1/2 - 3/4 in smaller in diameter.
I ordered one for a 170 instead so I have a little more clearance when I eventually get the header. I don't know exactly where it is that the clifford s/o header hit's the starter, but maybe that little size differance will eliminate the problem. The 170 starter seems to turn over my 200 with no problems at all.
S-man