I am considering doing this when my TM battery dies. I have a Tracker Pro Team 16.5 and I can't get the larger series battery in the existing space under the back deck, plus it is a pain to get to when I check the water level. Only issue is I have a 2 bank charger also and it connects to both batteries. I am thinking I could use new wiring up front and use the existing wiring from the back to extend the charger leads to the front deck.
I would have to place mine in the front deck storage area.
I may go with a gel cell and not have to worry about the acid leaking or getting low.
Mark 1:17 ...I will make you fishers of men