trimming

just bought a 2012 ram 1500 and put a 3inch leveling kit on. my question is without and plastic trimming can I run 20x10 with 33x12.50x20 with a -19 offset? any insight would be greatly appreciated! thanks!

Guys - anyone know if you could slap 35s on the 2014/2015 OEM rims and not have to worry about lifting/levelling and/or spacing/trimming? I pretty sure one of the BC members is running 37s on his - not sure it's same generation? Many thanks.