gut the interior, lighter wheels with skinny tall tires inflated to 100psi, tape up grill so its smooth, CF hood, remove side view mirror, kill switch on gear stick, political campaign sign as a skid pan, lexan windows, remove P/S and A/C if it has em.
pursue that 60mpg life.
Oh and ford escort seats will fit nicely if you swap the sliders. you will need hog clips for the lower portion. I had a 90 festiva (usdm same shit as 121) and it was great accept 3spd auto, hence why i sold. I put two 12" subwoofers and a 2000w amp in mine and nearly rattled it to pieces.