As instructed... look at the rules and records...
The basic safety is the same for all cars... it goes up after 175 MPH, more at 200 and way up above 250 if you are smart... all based on the speed you are chasing, not the speed you go.
But as has been mentioned, a 100MPH car has the same requirements for basic safety. You need to get a rule book.
The thing you have to remember is if you are chasing a record, you have to go faster than anyone else has since 1949.... A lot of folks have invested a lot of money to get records. PM Bob Drury aka One Run Bob and ask him how easy it is with a stockish body Stude to go 230... be sitting down for the answer.
I agree with the suggestion, set it up to run it in the 130 or 150 club... great entry level salt racing with the USFRA... at a reasonable price. Not to mention a little harder than you think it might be. If you do that and want to advance to running for records, you will have a better idea of the task you are facing. Speed is not cheap... Record Speed is expensive in most classes.
You may decide you don't want to run a door car at all, you want to build a car from scratch...
Sounds like you want to have fun... start in USFRA 130 club with a street legal or 160 club with a roll bar to make sure LSR is in your blood and budget.