34 coupe seat info please

[cas3]

the 5 gallon bucket is getting uncomfortable so i am in the planning stage of a real seat. i have a good base, made a new back already, have good sides for a pattern, and have a good original spring bottom. however, i dont know the size for the wood bottom of the seat spring. in the 34 resto book, on page d16 it shows a cabriolet body with a good view of the edge of the seat, and it looks like the wood actually extends past the front edge of the metal base. 3w seat is not exactly the same, but similar pan. so, correct me if wrong, but the back edge would would meet up to the bottom of the wood back rest, the sides would follow the metal pan shape but allow some room for upholstery, and the front would extend how far forward of the pans front edge? also short one seat track if anyone has too many, thanks skip