you need a tuneable ems to properly adjust the afr. evans offers break in on the dyno for an extra $100. take advantage of it. if you dont have a wideband you wont know what your afr is. you might run too rich washing out the rings. or too lean leading to excessive heat. if the rings dont seat in the first few minutes, they never will.

tow the car to them. let them do the initial startup, break in, and tune.