The 85 on back 350 is a direct bolt in. It depends on how much of the old system is still there. If the bell houseing is still there it will bolt right up. You will need a pair of the old ram horn ex. masnifolds. There was a "horse shoe" that bolted to the front of the engine for front engine mounts. The rear mounts are on the bell houseing. It's all a mater of finding the parts.
