where did you find this?

 

I just looked up 20x8.5 rims that fit the MC on Tirerack & looked at there offsets & compared with cars they make the Hurst wheel for with the same pattern & seen if any were close

 

same thing i do when i look for wheels the fitment guide is not accurate. The monte is not a common car to put mods on so rim companies don't usually list it. Instead do a search for what size you need and it works better. Most rims that will fit and are in the right bolt pattern are not listed as compatible wheels.