Throughout history, have more kit cars and supercars used Ford engines or Chevy engines?

Saleen S7, Ultima GTR, Factory Five GTM, SSC Ultimate Aero etc

There are probably more Chevy engines being used than Ford engines for Supercars. Chevy offers a very wide variety of parts for their engines and always has. Most kit cars usually have four cylinder engines in them.

Chevy hands down more after market part new and used and the 350 cube in has been a workhorse for years go to a hot rod show and check for your self

More "Crate" engines are sold by Chevy. However, kit cars are quite fond of foreign 4 cylinders