Why not just raise the DeLorean and press the hook against the cable?
I was a little surprised nobody else questioned this.
In the climactic scene where Marty needs to make contact with the cars hook to the cable at 88mph, why did they have to go though the hassle of starting the car at a specific distance and driving at a specific time?
Why not just simply raise the car so that the wheels will be spinning but the car will stay put while having the hook pressed against the cable?
The car won't be going anywhere but it will still be going at 88mph. That would aleviate any stresses of having to arrive and leave at the very precise moment.