A rolling dyno only represents a WOT run - similar to a drag strip but without the wind resistance. This is great. So you have a solid baseline for wide open throttle AFR.
Hopefully they provided you a file or at least a print out. (Although sadly this seems to be an exception rather than the rule)
A dyno with eddy current can be used to tune part throttle and cruise but that takes a very knowledgable dyno guy. Very very few guys are at that level.
