273 build idea......

hey guys when i got my dart the dude threw in another 65 904 & 65 rebuilt 273 long block he claimed to have hi-po pistons in it (i broght my bore scope & knew otherwise) none the less its is a .030 over 273 that has never been fired! Upon dissambly of it to check er out i noticed the low comp pistons seem alot higher @ TDC than i remember them to be stock, Is that rite for stock low comp piston's? check out pic...(its apx.035-.036 down the hole @ TDC) Qustion is would it be a better idea to build a zero deck flatop 273 or get the domed hi-comp pistons? I need to cc the heads too they look like they have been shaved aswell. stock charger 273 runs like a champ just somkes a little when ya drop the hammer its gonna get a re freash this winter, just wondering what way to go thanks for the input.