Hi Eddy thanks for your reply!i Mike called me on this and I was not sure. He is not chasing performance just wants a safe conservative cal. Cam is stock it has and was dynoed with 1.8 rockers. If it was put back to 1.7 ratio rockers could a cal through the mail (change to 540) be reasonably safe? As far as I know he does not AFR numbers. Making 620hp peak the fuel ratio on top seems in the neighborhood. Can I acll you?
Thanks
Steve

I'm not sure how the 1.8 rockers will affect the tune. I can say that if you go back to the 1.7 rockers and do the C.I. calibration, the tune will work just fine. It may or may not work with the 1.8 rockers. You would need to check it with wideband O2's to see how it affects the tune.
You can call me anytime. 615-216-7449
Eddie

Thanks Eddie you are too Gracious!
Steve