In around '91 or so my sister got 33 MPG in "Red" on a trip to LA.
It at the time had the balanced 2 liter, 121TI, 9.3 CR, standard 32/36 Weber, tii exh manifold, "002" tii dizzy, stock tii exh, 240 5spd, 4.10 diff, ST springs, Konis, 19mm bars, and 205/60-13 Yoko Y352's.
She kept a gas log book like mom and dad, so the proof is in writing!
When I had it in that same configuration I could only muster 29 MPG.