Paul,
 I was out at the airport today and got the firewall measurements you
asked
 for.  I added station 19 because this is where the outer edge of the
tunnel
 is located (Your drawing shows this as station 18.)

 Referring to your drawing, the dims are as follows:
   0 - 1/4"
   3 - 0"
   6 - 1/4"
   9 - .7"
 12 - 1.4"
 15 - 2.55"
 18 - 4.8"
 19 - 5.8"

 A 5" radius would be about right for the tunnels.

 The measurement on the front motor mounts is the outside-to-outside
 dimension and is 20 1/8", best I can measure.

 Thanks,
 Mark

 You lost me there Mark. Is this the dwg you are referring to?
 If not send me the dwg.

 Paul Lamar

Paul,
I can't locate the drawing you sent, but the "0" point was at the upper
right motor mount point and it went down the side in 3" increments.  The
19"
point is at the outer lip of the exhaust tunnel.

Mark

Do you have MS Paint?

Paul Lamar



Paul,

I think I have the drawing you did of my firewall on my home PC.  I'll check
tonight.

Mark