Eddie Martin at Bill Luke 602-242-4600. Knows the car very well and takes very good care of them.
Another choice in Phoenix is :
Brian Nightingale,
Race Craft ,
3334 West Wilshire Drive #36
Phoenix, AZ. 85009
Phone - 602.272.6990
He always seems to have a couple of Vipers in his shop getting modifications, some total race. I recall Foster's car getting major work done when it was still Blue.