I had a little time to replace the exhaust gasket and fix a leak this past weekend so I decided it would be a good time to install an offenhauser manifold that was given to me along with a Holly 390 cfm 4 bbl carb. It was all going well until I found that the two studs that connect the exhaust manifold to the intake manifold were about 1/2" too long and interfered with the intake manifold. I found very quickly that vice grips were not going to remove the studs without help from a torch. It seems that the easiest solution would be to run a die down the studs to get more threads and use a cut-off wheel to remove the extra 1/2". I'm reluctant to do this because the studs will now be too short for the stock intake if I run into a problem and need to change back. Is this a common problem when making this change? Is there a better solution to solve the stud length? Thanks for any suggestions.