Cats were introduced when lead free petrol was introduced. So not applicable in your case unless the engine is built post 1/1/1986.

If not then you'll need to meet whatever emissions were valid when the engine was built. Check out the site below if you haven't already.

If you can't date the engine assume '79 and meet whatever the car had to then.

If your manifold had a boss on each port, drill and tap them to take the PCV. It's plumbed between the throttle plates and valves. Easy to plug when you're on the track and running a catch can.

Do the same for the EGR. Back then many cars had such poor pipes and openings for the EGR they quickly became clogged. The cars could be tuned to run a better fuel air mix and the clogged ports left that way.

http://www.autospeed.com/cms/article. ... gulations-Part-One&A=2677