I would suggest you definitely do not do that Jason. As Jeffry says, the gearing will kill you.
With heavy 400-500 gram jigs, I guess you will setting up with PE5 or PE6 line? Rather than a Dogfight have a look at the specialist heavy jigging reels: Stella SW20000 or Daiwa Saltiga Expedition (or the new Saltiga 6500 slow gear version).
If physical weight is a consideration, then a Twinpower 8000 PG or Stella JDM 10000 PG fitted with an aftermarket 12000 or 16000 spool is a very good lighter option. The larger spool gives you enough line capacity. For example, I often use a Twinpower 8000 PG fitted with a Twinpower 12000 spool with PE5 for jigging weights from 400 to 600 grams.