It will help with wheelies, but due to removing the weight of the diff and extra drag the front diff/axles are putting on it. Also makes it more squirrelly to drive on loose stuff, but about the same on grass. Relatively fun way to drive a maxx IMHO. I ran a BB max like that for a while, then downgraded to a 18 and stock chassis for a while. With the big block, I was twisting the rear center axle to bits too frequently. Did just fine with the 18 in it though. Was like having a high COG 2wd ST. That was before the 3.3 came along with better diffs. I was tired of shelling front/rear diffs all the time. With only one... I only had to replace one. lol
The most painless way is to get two new front output shafts for the wheels (
part #4953x), take the diff out entirely along with the slider axles. Replace the front axles with the stubs only, then pull the center axle off the trans by removing the pin and buying a yoke (
Part #4927X), then you don't have a half shaft flopping around. The yoke and set screw are what hold the brake hex in place. Sure, you could take the center axle apart from the yoke, but you run the risk of busting it. They are cheap enough just to buy new yokes.
With those two parts, you can then decide if you like 2wd or not without risk of busting a yoke trying to take them apart and then have backup in case one wears out. Also, if you decide to go back to 4wd, just put your old parts back on and your good to go. Just make sure to not put the diff in upside down (have done it more than once... I'm a slow learner)
Or, do you have a 3.3 max? Part number for the center yoke is the same, but the wheel axle is two pieces, so you can buy new yokes only (
part #5454)and use the axle stubs you have.