I'd be concerned with the shocks and check the mounts.
Ask grandpa: DID IT BREAK THE SHOCK MOUNT?
I had a bad shock and it dove to the right (under braking). It could also be a brake issue from sitting. Rotor build up or a caliper not releasing completely.
It could be a bad alignment. center the wheel and check that the front wheels are straight. Run a piece of string from the back of the rear tire to the front of the front tire. With the steering wheel centered the wheels should be pointing straight ahead.
If not, get them as forward facing as possible and do the string test to make sure the R/F isn't toed out.