Those don't look like my stock 1994 Cobra pistons.. mine had matching valve reliefs in all 4 and a slight dish in the center bisecting the valve reliefs...
Those look flatter on top and they can be installed either way on either side.....
Either way, yes you smacked your pistons with your valves. 2.02's are too big on the intake side, but usually you can get away with a 1.6 exhaust (edelbrock). However it appears you smacked both sides.