These engines so rarely "jump time" that I feel like I need to ask how you know it has jumped time. If you check the ignition timing on my '92, it looks like it has jumped time because the harmonic balancer/crankshaft pulley has "slipped" on the rubber over the years to where the timing marks are 160* off.

The timing chain will almost always last the life of the engine. If something has gone wrong with the timing chain, I would check the condition of the rest of the engine to make sure the entire engine doesn't need to be rebuilt before doing just the timing chain.

If it has jumped time, I expect any decent repair manual would have a basic rundown on how to replace the timing chain. Check out the procedure in the auto repair guides at autozone.com (engine and engine overhaul section) and see what steps you don't understand.