I've had one Champion, a 2 row for $189 to my door (eBay) & it cooled OK but a bone stock 318 ain't gonna test it. I did have to redrill another hole in the drivers side flat flange for mounting but no biggie. I hear the oblong tubes are a bit smaller than normal radiators and that side flanges can be warped. I would check that right off the bat (warpage) & return it if needed but I'm sure I will get another Champion in the future.