Help please - rebuilding original AC car w/o AC

I think you can . However, the dash controls (vacuum) are not needed because they have nothing to control . The heat /defrost control lever can still function normally as it is mechanical . the fan switch should still operate because it is electrical . Be certain the vacuum A/C controls are eliminated or blocked because it could be a source of a vacuum leak that will effect engine function . As you may be aware the A/C box weight is 48 pounds but unfortunately a non-A/C box will not interchange as the firewalls are different . My Scamp was A/C and along with the condenser, expansion valve, compressor and brackets I saved almost 100 pounds . (I weighed the stuff) Later on I will install a heater/defrost . We are here to help . Good luck