Wanted to know if anyone has swapped from manual 2.3L 4-cylinder to Focus-type engine. In other words, I would like something that will save gas and is quiet but able to produce horsepower if the need to upgrade comes in the future. Are there other options like hybrids? The gas prices go up and down. I have 88 mustang LX body style with 2.3L. It runs OK but I'm about fed up with the whining of it. Sometimes I just wanna yank it and roll it down a hill into the bushes. Maybe there is something I could do with the exhaust. Plus I'm tired of fixing it and would like a cleaner, newer feel. I want it to be fun to drive also. I already have 95 mustang GT convertible gas guzzler. Links or advice would be helpful.