I'm swapping from a M6 to a th350. What shifters do you use and what are some things to look for in a shifter? thanks

 

You will want a reverse lockout for sure. Other than that, its preference really. I use B&M Pro Ratchet and its very nice, almost fits (with some slight fabbing) like it was meant to be there. And it has two WOT Switch mounts, one for P/N and one for R lights.