streetwize is building a combo like this. he's using 6" rods and KB167 pistons to get 0 deck. other piston combos to try would be 6" chev rods and KB165's (283 pistons, same CH as the 167's, but w/a SBC pin size) in .040 or .060 over (would be .005 or .025" over 318 bore) this will yield ~10.2:1 with a .040 head gasket and 64cc heads.

or 6" rods with these 283 pistons which would end up ~.030 in the hole using a 9.6" deck height. this should yield ~10:1 with a .028" gasket and 64 cc heads.

or run a 6.25" chev rod and these chev 250 I-6 pistons with .080" cut off the top to have a very slight dish and 0 deck, which with .039" gaskets and 64cc heads should yield ~10.2:1 comp.

or chev 6.25" rods and some KB2228 pistons for a jeep 2.5/4L...this will net .020 above deck for blueprint 9.6" deck height, so either mill .020 off, or run the standard .054" thick fel-pro gaskets for tight quench...jeep wrist pins are .003" oversized compared to chev wrist pins, so you should be able to hone the rods slightly to fit them. these have an 11.5cc dish, so as is w/a .054" thick gasket, it'll yield tight quench and about 9.6:1 compression with a 64cc magnum head.

283 pistons, the valve reliefs will probably be in the wrong spot, and the 6cyl pistons I listed, there are no valve reliefs, so you're probably somewhat limited in cam selection as far as lift/duration.

the only reason to justify all this mickey mousing around though, is if you have an '85-up 318 block set up for a hydraulic roller and you plan to run one. otherwise, just look for a 360, to be honest...you can find magnum 360's pretty reasonably, and they also run hydraulic roller cams.