what are these between my duals?

[Andertusa]

Thanks for that pic Towcat, I kinda always thought the wheel arches on the duallys was just kinda 'attached-to' the fenders, I didn't realize there was SPECIFIC fenders for them, or that they were 'extensively modified'.

 

[wiguy]

every indication tells me you are a SRW to a DRW conversion. the doghouses look aftermarket due to the placement of the running lights.
when you look into the inside of the truck bed/doghouse area, is there a cavern as big as what you see in the pic I posted?

yep, same cavern as in your pic.

 

[Andertusa]

Box replacement?

 

[towcat]

yep, same cavern as in your pic.

are you planning on towing heavy?