Daily driver 318 roller cam expectations

1991 318 compression ratio spec is 9 to 1 if my information was correct. I know most production motors never get to their spec. The heads are the stock heads for that same 1991 engine. I think I have heard they are good heads with closed chamber. Have read they do very well with porting and bigger valves. I am trying to not get into chasing big horsepower because once I do that, I lose the economy and reliability of something I can just drive. I have a 340 powered bracket car and I have a 68 Plymouth Satellite with a 383 that is 11.5 to 1 and runs pretty well. I would like to have a car I can run cheep gas in, drive with reliability and fun. A hint of muscle would be nice too.