I know quite a few have molded in the front spoiler.......
I strongly advise against it.make it fit correctly and easily removeable.
If not, IF the van should ever need to be towed.The roll back operator will REMOVE it for you.It will not be pretty...
First of killer job on the air dam!!!!!!!!!!
Second I was told the samething by the shop that has my van. If for show and mild use they said molding was OK, but for a daily, the chances of getting damage was higher and to repair a molded in set was a lot harder to fix and paint than a nicely lined up and bolted set.
We might also put color fender welt(like what was used on the 30's and 40's cars) between the flares and body. It had black when I bought the van. It looked good!!