I believe there's a tech tip here someplace about bringing old dormant engines back to life. First thing I would do is put some ATF in all the cylinders and let it soak a while before turning it over. Also pull the valve cover and make sure all the valves are free and not stuck.
Also, 12 volt conversions are not that difficult.
Good luck, and keep us posted on your progress!
Thank you for this
I had never heard about using ATF
If I can get the plugs broke loose I will do just that.
And remove valve cover
I’ll even try to post some pics if able
Thank you