Jack, a fire bomb is on my list of future enhancements, & I have the same problem as you - where to put it ?
I am not familiar with the SPF layout, but some of my fellow DRB owners have mounted them just behind the firewall on the RHS. To do this, they had to put all the fuel system under the back of the rear tank cover (in the void surrounding the lower trailing arm).
In my ignorance of such issues at the time, I decided to put most of the EFI fuel system on top of that tank cover (for ease of maintenance), so I now figure that I only have 2 potential places to mount the fire bomb :
- at the front of the passenger's footwell (short passengers need only apply !)
- suspend it under one of the rear body mounting struts that run down from the shock mount area to the hinge/support points for the rear clip.
So far, the latter looks more practical, but may need some heat-shielding to insulate the bottle from the exhaust system heat.
If the above ideas don't work out, there might be a possibility of mounting the bomb in the front - on the floor, just in front of the steering rack.
Kind Regards,
Peter D.