Cam Swap

Hey yall. Bought a cam and new valve springs to go along with it. I've done one cam swap but it was on a mustang. Anyone have a good set of instructions on R&R'ing the cam on a 4.3L V6 truck? How do I go about removing the intake manifold and fuel rails and crap? Will I need an impact wrench? I remember it helped on the stang a lot. I guess that answers that question. Will I need to remove the radiator to pull the cam? Didn't have to on the stang. Any hints, tips or degreeing the cam once I get ready to put it in? How bout the springs? Pull the rocker arms off, compress the spring, pull out retainer, replace spring, reverse order. Basic idea? On adjusting the rocker arms (I'm staying with the stock one's for now), do I just sit there and tighten them down until the pushrod stops moving and then back it off a 1/4 turn or so? Sorry for all the questions but the Stang seems to be an easier task than the truck is going to be. I plan on doing the install next week sometime. Figure give myself about 3 or so days just to be safe. Also, will MTI tune the truck once I get it running? I'm getting the Comp Cam 56-460-8 cam. I'm also getting the 986-12 valve springs with it. I plan on running nitrous or FI later on down the line (headers are on my list of things to do next). Thanks for the help yall.

Also. What about the lifters? How do I keep them from falling out of their homes? How bout the valves when I replace the springs? Should I pull the heads off to do it? I'm gonna have limited access to air tools so screwing an air hose in to the cylinder isn't really an option. Thanks for the help yall.

P.S. Should I go and buy a service manual for this?

Anyone?

As far as valves go if you have no air then just turn the motor over with a wrench (taking the spark plugs out will make this a lot easier) until the cylinder you are taking the spring off of is at tdc, the valve will have no where to go then.

Next the lifters, I have heard a few methods for doing this, you can just pull the cam and pray, you can also get 16 of those pen magnet things and hold them up with that. I think there is a tool made to do this as well but can't remember anything about it right now.

Hope that helps.

Thanks. Now here's another question. How do I tell if it's at TDC? Isn't that right where the intake closes and the exhaust opens?