turntable

Slide old one out, slide new one in. Should be fine.
Table that old you should check the bearing, clean and lube if you can. It has after all been half a century. Bearing lube can go dry.

Make sure it's running properly before spending on a stylus.

I have Pioneer PC-1000 mkII cartridge with Beryllium cantilever, one of the greatest MM, you can read about it online. I enjoyed it so much that i’ve been looking for almost every sample appeared for sale and bought nearly all of them (including original headshell). If you want to update your Pioneer turntable with perfectly matched cartridge for this deck then look for Pioneer PC-1000 mkII, this is the one than was made for Pioneer Exclussive series of turntables. In 1976 it was 30 000 YEN cartridge. 

Here ya go!
https://www.lpgear.com/product/GRABLKSTY.html