318 converter with a 360

I am replacing my 318 with a mild 360. Would it be worth buying a high dollar torque converter or will the 318 converter do the job?

stock bottom end 1977 360
x heads that have been milled at some point to 68cc
comp cams XE268H
340 manifolds
3.23 rear gear

I am using a B&M flexplate

Thanks