Exhaust manifold bolt lengths????

[Marshmountain]

Does anybody know the length of the factory bolts that attach the exhaust manifolds to the heads??

I know that there are (2) different bolts, so I need the length of both the:

3/8" 16-pitch bolts

and the:

5/16" 18-pitch bolts.

I am in the process of ordering all new exhaust parts, and I want to make sure that I have everything on hand to do the job.

Thanks in advance.

Peter