J heads, magnum manifolds

Do you know the size of the bolts? I know its 5/16, not sure of the length

I did mine way back in '95. At the time, i ordered the factory fasteners rightt out of parts book as I worked at the dealership. I'm pretty certain you can now get em aftermarket now.

BTW by studs, I meant the LA ones typically found there. That was my situation. YMMV.