You'll want to use a new gear on the cam. The factory cam is fiber and probably well due for replacing with the mileage you say the engine has on it. A replacement gear should be available at any auto parts store and they are usually made of aluminum. One commonly stocked brand of gear is made by Dyna Gear and will cost you about $25. I don't know how much Comp gets for their cam gear.
The new cam gear needs to be shrunk onto the new cam, best done by your machine shop for a few bucks. Bring your old cam with you as the thrust plate and spacer must be transferred onto the new cam or if it is badly worn they will need to install a new one for you.
The crank gear doesn't have to be replaced except in rare instances.
Just make sure the new cam gear when you get it is for a 230 engine and not the heavier duty one for the 292 which has different pitch angle on the teeth and won't work with your crank gear.
Sounds like you have a smart plan that coincides with your budget. Good luck with your progress on the car.
