Thermostat housing bolts

[synchro66]

I have a 360sb with an Edelbrock 2176 Intake manifold. There are 2 different sized holes. Can someone tell me as per attached pic, the different size/thread spec of the holes.

 

[Rakers_SS]

Unfortunately I don't know the size of those holes. However the Thread Checker tool below has been very handy for me with working on my Duster. Great tool to find the nut/bolt size you need.
https://www.summitracing.com/parts/...p5fEs-nqqKXm5a_-hWJueaIUqutjThtRoCPNQQAvD_BwE

 

[Oldmanmopar]

The holes closest to the front and rear are 10mm -1.50 common on later 80's cars and trucks. The other two closest to the blue fitting and the sending unit are 3/8 -16 . Common on all early cars is 3/8 -16