A Marlin barrel chambered in 35 Remington can be rechambered to 356 or 358. I don't know if any 'smiths do the 35 to 358 job, but Regan Nonneman does the 35 to 356 job for around $100 plus s/h/i. Once your Marlin 336 is chambered in 356, you can use 358 cases in it as long as you load to 356 OAL specs. I have used 358 cases in my Nonneman converted 356s, but only to prove that it could be done.
Jeff