318 Torque cam
I would agree with a Comp XE256 or 262.
They would have good low end torque for the gears you have. The XE268 "still" has good low end torque, but revs higher than the other two. It will lope as well. Works good in my Dusters 318 and works best with 3.21a or lower (numerically higher). It would do better with a slightly higher stall converter, if one could be had.
Mine has stock 318 heads with a little work done to them and stock compression, but would work a little better with your 302 heads, with smaller and closed chambers. If you are not using headers though, stick with the XE262 or 256, as it may be atad softer with the 268 if manifolds are used, mainly below 1,500 rpm.
No matter what, go no higher than the XE268 in a stock compression 318, as any more will diminish cylinder pressure. The lift at .050 on the 268 is .470/.480.