probley 145 hp.
In 1984 the (non-turbo) 229 (231 in CA) was rated at 125hp. Your 1978 would probably have about the same.
.... 231 CID....
that was a dumb question
did u really hav 2 ask that question cuz u answered ur question in ur question lol, in the 1978 u could go up 2 a 454 crate motor but hav fun buyin 1 cuz they sell quick
it might be a buick 3.8. that was base gm engine back then.
Looking for a Used Monte Carlo in your area?
CarGurus has 1,402 nationwide Monte Carlo listings starting at $2,588.
Search Chevrolet Monte Carlo Questions
Chevrolet Monte Carlo Experts