alternator help

[milo]

hi everyone... so i finished instaling my painless wiring kit on my 53 chevy and i thought all was well but then i noticed that the voltage while the engine was running never got above like 12.4 so i went out got a new batt and a delco 10-si alternator. i should tell you that i put in 350 for an engine. anyway i put it all in ran the wire for the term 1 made a jumper for term 2 and started it up.... 13.5 i thought i was all set then i went to tern it off nothing so i unplugged the reg and it turned off.. put in a diode problem solved but now 12ish volts??? have tried it all put in a light tried one wire tried a fake voltage into the field excite i got nothing and am in need of help