O.K. everyone, I'm new new to Porsche ownership and new to this site

so be nice even though I'm sure you've read these questions a million times before! As the proud new owner of a completely stock 1973 911T I need to know what size, brand, model and inflation because baby needs a new set of shoes! Due to her vintage and condition, track work is out of the question but spirited spring-summer-fall driving as well as some on-road rallies are definitely on our horizon. I am willing to sacrifice noise and comfort for performance but I dont want to put aftermarket wheels on or roll fenders or anything like that. If it rains she gets parked or at least driven VERY conservatively. So, tell me what you think and thanks in advance for your suggestions!