just bought first stang, need help, dont know much about this stuff

[od0g1742]

all the info on my vibration is as follows:

it happens only above 90-95 miles per hour, it is a very heavy vibration that comes through the shifter area regardless of if its in gear or not(i tried putting it in nuetral but it still vibrating) the car also has some kind of hurst shifter but i dont know if that has anything to do with it. peolpe have been telling me things like ujoints and drive shaft and things like that.

thanks for your help