I wouldn't, I would pay the extra cost for the ICON piston, and build the engine a bit on the larger cam size knowing I will be using a high stall converter, but this is not my build and the original poster seems to want more of a daily driver that is simple and not too expensive?
What I was getting at is with the small cam you don't need the piston valve reliefs of the KB-162, and the speed-pro L2315 gives a slight bump in compression ratio over the lower deck height KB-162 flat top piston (if the block is not cut to zero deck the pistons.) And that if planning to use a larger cam that might need the valve reliefs like the KB-162 has, you would want to bump up the compression with the larger cam anyway, so the dome piston(s) (KB-400 or ICON-687) makes sense.
I think the discussion sort of got away from the ICON piston, likely because of cost and with the mild cam the less expensive pistons will get the job done.
Really, your talking a really simple and mild build, no reason to overthink all this stuff. Having the right ignition advance curve, and torque converter will have more of a performance impact than 1/4 point of compression which is close to the difference between the L2315 and the KB-162. Again, at the same block height.
