I am wondering if this is possible. Plus someone from the DD-WRT IRC channel told me to ask here.
Since the Netgear WNDR4000 is supported on DD-WRT r18024, would that build work on the WNDR3700v3. I know the FCC ID's are different, but from what I have seen of the boards and chips of both routers, they looks same and specs of the chips are the same. The only difference is the WNDR4000 has a 3rd antenna on the 5GHz side. I am not sure tho.
Not possible.