Intake Manifold Carb Hold down stud thread sizes?

[Fiat88]

Having trouble getting the 4 studs out of my old '79 Smog Manifold. I need them cause my 1800 Intake Manifold is missing them. Can anyone direct me to a site that sells new studs? Not sure of the thread size either. Thx for any help.

[So Cal Mark]

8mm x 1.25. Try Mcmaster-Carr for hardware

[Fiat88]

Thanks Mark. I gave it another shot using the 2 nut and 2 wrench method and got those suckers out.