The exhaust manifolds are held on by studs and nuts. The studs have course threads in the head with fine threaded nuts. There is a common problem with the manifolds being attached with studs: they cannot be removed without lifting the engine up to clear the front suspension. If the manifolds were held on with a course threaded bolt instead, when the bolts are removed, the manifolds slip out easily. Is there a reason the studs were originally used? If the reason was ease of assembly at the factory, would it be a poor decision to replace the studs with bolts? Ken Rimington 1956 Dodge Custom Royal |