you could take the intake out (if you didn't yet), makes things lot easier (i assume you did but just based on your question regarding the rear bolt). Also, just in case, check the thickness of the header flange (that goes on the cyl head) and make sure it matches the intake, if not you'll need some custom washers (if it didn't come with washers, not sure how the clifford is but the pacesetter i have had some)