Hey Rick,
As you know, I am not a stickler for originality.
I used the 1/2" thick x 1" wide, dense black rubber foam, peel and stick window insulation sold by Home Depot and Lowes. It fits perfectly in the channel around the openings.
So moisture will not blow or seep through, I put the joint of the hood seal at the rear and the joint of the trunk seal at the bottom.
The hood and trunk lips press into the foam and the hood and trunk are sealed ALL the way around. Also they will never rattle.
Mine has been in place for 15 years and is still in excellent shape, but I will replace it when I repaint early next year.
Tim