Cool car. I briefly had an 85 cutlass in college. It ran ok. I eventually tosse the CC stuff for a normal carb and a good old fashioned points distributor that was in the hoard. It ran better, i think it was mostly due to the more aggressive advance curve in the points dist. The car regularly got over 20 mpg. I drove it one winter and sold it to a circle track guy.
I had an 83 t-top car. Ran high 15's bone stock. leaving it in drive was a tad faster than shifting gears. KID