Hey clark this is Eric with the viper from manton. I would use 1.060's with your viper. With 9 tooth drivers you will have clearance issues with 1.200's. Some use 8 tooth drivers and run 1.200's but i hate the idea of 8 tooth drivers, too tight of a bend for me. Also 1.200's tips back more that 1.060's because the 1.200's have more leverage than the 1.060's, thus less traction overall. You will hook up fine with 192 1.060 chisels. Run woody's angled backers also. It helps a bunch. Hopefully this helps you out. Hope to see you at cadillac if they still have it. We got a new toy that I think you will like....1000cc....450lbs....2-stroke....well I guess you will have to come to caddy to see it.