I would try a 44 or 46 rear.can you even pull 5th gear with the gearing your running? The +4 will help. I have almost the exact same setup. I run 14- 44 and a + 4 and launch in second. But I only way 155lb.
would like to trade these for some 22x12x8 12 or 14 paddle extremes or haulers.I also have a set of sand skate II that I would throw in for the right deal.