I have a Yank SS3600 and it is great, works great on the motor. Little too loose/inefficent on the juice. Finally got some racing in tonight with it. Let me tell ya, on the hit, its bad ***, but I have no top end. I'm running a 3.73, 315/35/17's and spraying a 200 hit.
Tonight I was on the limiter; 7K at 125-127 mph. I am going to be making the change over to a 325/45/17 (28") and see if I can gain some MPH back. Tonight's hits were from a 45 roll. It feels like its getting the job done, but also like it doesn't have enough useable rpm.

Any suggestions?
Right now my plan is to get the 28's on there and see where that lands me. I'd really like to be able to run at least 135 in 3rd gear.

 

28's should cure you with 3.73's