drew the pattern and cut the firewall out today.. it's a simple design done by using a peice of moulding like a divider and drawing a 1/2 moon.. because the body will be the full 48" wide the full length. the cowl and firewall are the complete 48" wide, this will aid in room and comfort... the firewall is quite tall in the center. 39" to the top, and it's just over 30" tall on the sides. I might shorten it a little from the bottom