Make sure your motor mounts and trans mount are in top condition-
Extreme case -
I used to have a 71 Rustang... it apparently had two bad motor mounts and a bad trans mount, they were connected but not very well. I got rear-ended which pushed me into the car in front of me. Very light hit- about 15 mph. Not a lot of damage- but both motor mounts let go, the trans mount let go. The fan stopped about 1/4" from the $299.00 radiator. Both cast iron exhaust manifolds snapped- replacements were $500 ish. (I got headers out of the deal, way cheaper). Transmission linkage, throttle linkage, fuel line were all tweaked pretty bad- could have been worse with the fuel line and hot, broken exhaust manifolds.