OK, so would one of those battery jumper boxes be a better choice? We have one from Sears and paid I think $20.
It would be OK provided the car's battery is not absolutely dead.
Can you push start a Healey safely?
Yes if you are on a good hill or have a bit of extra help'
I have a BJ7 and recall push starting it several times in the 1970's. That doesn't make it a good idea. Could it hurt the OD?
No you should not hurt the OD as it's switch should be disengaged
Fwiw----Keoke