Hi Mike and welcome to the forum! Our community is filled with a ton of knowledge and very helpful members; so post your questions! We also have vast library of DIY tech articles to help with many of the procedures and maintenance that you'll likely be doing - I'm attaching a link below that is relevant to your '74. Please let us know if you have any questions and welcome!
https://www.pelicanparts.com/911/911tech_articles.htm