Only had mine up for a couple weeks ( on road only so far).
I would do it again, look at the numbers and see if you think they are enough.
The post on Marlin has a lot of info, you just have to wade through all the BS.
Like stated a lot of other motors you can swap with more power.
The 3RZ is close to the 22RE in weight size and fit and has about 1/3 more HP & torque.