b16a2 is OBD2, if your re-using your OBD1 LS harness you have to switch plugs for the injectors or you can use your LS injectors.
you also need to find an OBD1 b series vtec distributor or you can re-pin the b16a2 distributor.
for the ECU you can use a P28 ECU then wire vtec and have it...