Re: swapping in a 304 instead of a 360?
Somewhere on the offroad site they have the tech info of horseys, torque, weight, etc of all the engines offered in Jeeps. If I remember correctly the 304 wasn't much more powerful than than the 258...I would go to the 360 for more horse power and torque, especially since its gonna be essentially the same process for installation given that they share the same block. The only disadvantage I see is a decrease in fuel economy. Just found the site (someone can HTML so its a clicky): http://www.off-road.com/jeep/tech/engine/
95 Wrangler Rio Grande...She's gettin there - I'm all about the 4 cyls