Need help with the engine

I have a 4 cylinder and doesn't have enough power and was thinking how hard is it to change the engine to a V8 please I have a 1993 jeep Wrangler

Look here
http://www.novak-adapt.com/knowledge/engines/swap-guides/chevy-buick-gm/tj-swap

You may want to consider everything in your Jeep is not made to take v8 power. Transmission,T case, frame, axles.

Welcome to the Z. The swap you're suggesting is common, but takes a lot of experience and know-how. Sometimes it's best to buy a donor vehicle with the drivetrain you want. The stock axles will handle moderate driving until you were able to upgrade them. The GM 5.3L and 6.0L are common swaps. There are companies offering motor mounts, engine computers, and wiring harnesses to make install a lot easier. 4L60e or 4L80e would be good transmission choices.

just buy a 4.0 wrangler. its way less hassle and will be cheaper in the end.

your is fuel injected so you have to make the jeep pass inspection once you are done. don;t forget about that, also