How do you plug the holes in the exhaust manifold after removing the air pump and air injector manifold on a 1988 chevy 454 CI with factory headers. Need to know the size (diameter) and threads (tpi) to make plugs? Or if anyone knows anyway to do it. Taking chevy P30 with 454 from CA to NC do not need the air pump in NC. Thanks
- posted
16 years ago