Sam - I got a chance this evening before going out to do some photos and measuring for you. Add 3-1/2 inches to the dimension you see on the tape for the housing(33' tape):
Firewall to seat back - ~42"
Height of seat - ~8-1/2
Width of seat - ~18"
Seat back to brake pedal - ~36"
Height of seat back - ~18"
I 'forgot' to photo the overall firewall to cockpit rear padding, but it is ~52"
Let me know if you need any more.