Bolt/ stud size

[JaysNMDustr]

Exhaust intake to head stud size?

 

[BillGrissom]

Does "exhaust intake" mean "exhaust manifold"? I recall 3/8" fine thread on most engines, but you don't tell us what you have. Intake bolts size depends on the year of the heads, could you tell us that too?

 

[JaysNMDustr]

1970 /6 225. Exhaust manifold stud, threads on both sides. Missing 1 upper stud secures intake and exhaust manifold with a spacer n a nut.

 

[Charrlie_S]

Studs that screw into the the head are 5/16 coarse thread in the head, and fine thread on the opposite end. Approx 1 7/8 inches long (depends on the length of the coarse thread). They need to be long enough to get the triangle washers and nuts on, nut not so long that it is hard to get everything mounted.