235 vs 350

[Midgets50]

hi all,
after much deliberation i think i might keep the original 235. but i want to change my truck to 4x4. ive read that a turbo 350 or 400 will bolt up and work. if i did this and ran the axles of the 4x4 i have would the 235 be able to handle the power demand that the 4x4 will do. im not gonna do any heavy off roading just might need it for winter months with the snow and ice. i might do some pulling with the truck. will the 235 be able to hold up to this or should i just switch to the 350