80’s 318 compression ratio figuring out where I’m at.

Will 273 piston pins work without mods to the kB pistons and stock 318 rods? Are those floating piston pins? Looking to do this cheap. I’m not building a daily driver. I know rebalancing is the right way to do things, but with 273 pins could I bolt it together and go? Wonder how much My 0.030 over pistons that are in there now weight compared to KB’s. I think they may be sealed power brand, I’ll check and see if I can tell if not I’ll post a pic and maybe others can help identify.