Re: Engine Question
were talking about a hundred CID Difference with the 258 being the leser of the two. unless you have a two barrel 360 breathing thru miles of smog equipment and a built 258 they'll probably be somewhat close to similar power. 258s and 304s are more comparable. 200 hp and 250 Ft lbs should be easily attainable with 4.2 4bbl intake or FI, cam and free flowing exhaust should free up plenty of power.