all crxs where hf, dx and si

84-87
hf 1.5 carb'd
dx 1.5 carb'd
si 1.6 dpfi

88-91
hf 1.5 mpfi
dx 1.5 dpfi
si 1.6 mpfi

resource.crx.org has lots of info on the 88-91 models including all specs