I'm excited,gettin new toy 1949 DODGE!

I am learning..slowly! Ha I do have a FSM and the eng. wiring dia. refers to D29 or D30, etc etc. I did learn that refers to the eng. and has that stamped on side of it!!!
Yep wired backwards. The guy I got it from is my age or a little younger. He inherited it from his 95 yr old uncle. He tried to get it started, pulls pugs out and leaves the out for ?? how long. He wants to try to turn it over by hand but...... And... Not good when plugs are on TOP of the engine! ha It had been parked last 20 yrs or so, as the owner went to the nursing home. Running, driving some point prior.
I enjoy learning about new things that I can develop an interest in. IF anyone reading this has experience with flatheads, please let me know if a book on "how to rebuild flathead Fords" is worth the $, as it probably deals with v8s mainly but I have to wonder IF the Mopar strait flathead and Fords version of really much different?
I know, someone will say "drop a 360 in it!!!!! ha
First thing i would do is stick a couple teaspoons of marvel mystery oil in each cylinder, hoping to get it loose. Dont use too much, excess will go past open flathead valves.