Ha ha...14 large to spend on a flathead.
Maybe if I won the lottery....
I have bought finned aluminum heads for flatheads around $225 to $250 a pair.
And about the same price for dual carb intakes.
Look for some Ford truck motors. A lot of them had the 4" crank in them.
Any engine parts that you buy used should be magnafluxed. They are old and tired.
Like me.