I want to convert my 1995 Jeep Wrangler (4 cyl) to V-6 or V-8. Is this possible? Is it worth it?Suggestions?

Everything on this 1995 Wrangler is stock. I want more power and more speed on the road. Do you guys think its worth putting the money into it? Can it be done? Is the body structure big enough for a larger engine? Any info is appreciated. Your loyal Jeep fan, ~Jeepboy~