Okay here is my 2 cents then. If you have muscle that is great just one extra person can save hours. To save a hernia get a cherry picker Harbor Freight sell them with balancer less than $200 as do some part store chains. Do all prep work first get new engine and any new parts you know you will need. Then take your pictures of the engine bay to use for reference if needed later. Start removing and labeling things like alternator, starter, Carb/tbi, disconnect the exhaust manifolds from pipe, unbolt a/c and ziptie out of the way without unhooking the hoses going into it. Basically strip all accessories from the engine it makes it easier to manhandle without all the extras to get caught on something. Drain and disconnect the radiator hoses and remove radiator. If you decide to remove the front clip go ahead and unbolt but keep in mind that too remove the front clip you will have to disconnect the a/c hoses next to the radiator and will have to recharge the a/c. You can just remove 1 fender and the wheel on that side and have good access. Honestly I wouldn't remove the front clip or a fender if you don't have to. Once you have the cherry picker and new engine you can jack it up and see how well it clears the front end of the truck to make a decision on if you will need to remove the fenders or clip. Go ahead and unbolt the flexplate from the tc and if you go ahead and support the trans and the engine you can unbolt the engine from the trans. Once you have everything disconnected then call in the muscle. Remove the hood and then the engine. You can set the engine down in an old tire to remove the brackets, manifolds etc to swap to the new engine. Once you have the new engine assembled to the same level as the old one was when you removed it, you can then put it back in. Connect the engine mounts and bolt to the trans, bolt up flexplate and tc and exhaust pipe. Then simply start reconnecting everything you took off taking care to clean things up and inspect them before you put them back on. If possible I would recomend having your muscle come over to help remove the hood a few days ahead of time to make it easier to sit in the engine bay without bumping your head and having to hunch over so much. Then have them come back to put the hood on after you have finished hooking everything back up. But that is really more convenience than required. As long as you are good at labelling everything as you take it off putting it back on isn't so hard. The entire process of removing and reinstalling the engine can be done in a couple hours as long as you have all the prep work done. Since this is your first time the prepwork is the biggest step especially if your helper is muscle not knowledge and it will make things go much smoother. Lastly don't be afraid to ask a question even if you feel it is stupid. Good luck!
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... I'll see what I can do.. I doubt I could rig up something strong enough to hold 600 lbs 
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