Welcome aboard Bryan!
I can't help you, unfortunately; but there is an interesting article on the history of the A-4 in this month's Good Old Boat. You should check it out.
I got an Old Fat Boat
She's Slow But Handsome
Hard In The Chine, but Soft In The Transom
I Love Her Well, And She Must Love Me
But I think It's Only For My Money
. ..... Gordon Bok