It depends on what era of fuel altered you're building, Michael. Most of the "modern" fuel altereds (like the one pictured above by Sam) are running with a 120 - 125 inch wheel base funnycar styled chassis. If you're going for the "classic" period-correct look from the 60's or 70's...well then, it's either the shorter wheelbase chassis from the early style Revell funnycars (JJ Vega, Gene Snow Charger, Blue Max Mustang, etc.), or a donor chassis from something like the Winged Express, or the Black Widow bantam altereds that were offered not too long ago. I hope this helps.