Intake manifold is it stock..which gaskets to use

Ok maybe dumb questions..i got my car almost ready to go on the road an noticed the intake manifold is leaking very lightly out the front also getting few bubbles from thermostat surface of intakeView attachment 1715159171 ..must need to be resurface flat.have new thermostat housing..want to know if I have a stock one or aftermarket and how to tell..and which gaskets are the best to use also any tech tips for the installation would be appreciated..sorry if seems simple stupid..but im new to the cars and would just like information instead of doing it trial and error
Looks like a factory iron intake