O'kay, here we go, I remembered to do this while it was still light enough.
The engine pipe is a Standard part for 88" & 109" shared by all S2A except 109 Wksp and maybe some FFR/FFT.
here is where the engine pipe joins with the Int/pipe, note that it goes through the chassis behind the transmission
next image shows the Int/pipe going through the chassis towards the rear
now showing how it attaches to the muffler
and from another angle
I hope that's of some help, cheers Dennis