okay, so how much time in the 1/4 do you think I could gain by going from 17x10in Boyds to stock rims and smaller tires?

 

A minimum of 1 to 2 tenths, depends on the comparison of the 2 pkgs.. What are the weight on each, thats what you need to look at if you can, tire and wheel pkg. Use the lighter one when running the 1/4 mile. I've seen it help as much as 2 tenths on a good note and being consistent with that.