Converting the grips to a split grip isn't really much of a problem. Any competent Custom Builder can handle that. Changing out the reelseat can be an issue though. With a blank exposed seat you wont be able to slide it on from the rear because it wont fit tight enough. Depending on guide sizes you may be able to only remove the last few larger guides and get the seat over the smaller guides towards the tip. Epoxy the seat in place and then rewrap and epoxy the guides. Your best bet would be to get a with a Custom Builder and let them know exactly what you want done, see if they feel comfortable doing it and get a price. It probably wont be cheap, but that is probably the best way. If you decide to do it yourself I would be glad to help if you have questions, email if you need to.

Also, something to think about. Is it worth going through all of this for the rod. Is this a rod that you really like enough to dump money into?