Not a slant. 1947 boat Engine

Helloooooooo FABO!
(Shouted out like Robin W in hello Vietnam....RIP)

My buddy from work has a 1947 Chrysler engine in his boat. I have not seen it but i think its a flathead and looks like this straight 6.

He says it spins but doesn't run.

Check me here.

Arrive.
Squirt some ether and see if it pops?

If no then....
Pull plug
Check firing order/tdc pointing a 1 and all that.
Check spark
check compression
(Fuel) (ether, so i left that out)


basically....are there any nuances to these motors that are going to change the usual approach?

Bring an extra big hammer (to throw)?

A come along to attach it to the anchor chain to put in the bottom where it belongs?

Thanks in advance FABO!!