65 273 heads

Does anyone make a set of intake bolts for the 65 273 head? I believe they are smaller then 3/8 (5/16). Also I need the thermostat housing pipe fitting (to the water pump) as well as the one to the heater hose. finally installing the new" D4B intake I got 5 years ago).:blob:
Where can I get these? Thanks in advance.