3500 too high for me.
I have spoken with a number of people including Mike at Yank and they have all recommended that I put at least 3.75 gears in to tighten up the feel. I'm still running 3.23's. If I ever get tired of the SY I plan to go to the ss3600. much tighter feeling with same high stall benifits. (so I'm told)
I have an ST3500 and 2.73 gears and can flat destroy a pair of tires in no time off the line. (running the widest I can get on 16" stock rims)The up side is from a 20-50 mph roll it really rocks when you nail it.
Been running this combo for almost 50K miles now.

