Couple 75 Questions

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So I am in the progress of saving my new 75 short stepper from what was certain to be a one way trip to the junkyard, or as I am calling the project "recycling". I have a few questions, one difficult, one simple.

1: The Motor
The truck had been "rebuilt" about 6 years ago or so the previous owner claims and only driven about 4,000 miles. It then basically sat for 5 years which from the looks of when I got it dry rotted all the seals, on everything.
When I got it it was leaking from everywhere. Engine, Tranny, Rear End, Steering, you name it. Over the 3 months I have had it, I have basically replaced every seal in the motor, tranny, rear end and steering. So now its running good and it even passed emissions better than my 2000 Xterra did. The problem is that there is some "ticking" or "pinging" from the valve train when its under load, my mechanic checked it out, adjusted the valves and it has seemed to help a little, but he basically told me I should think about replacing the cam and lifters because they look worn.

So heres my question, I am looking at Crane Cams Kits, but have no idea which one I need. I am looking to add a little power to the truck, but I don't think I can go to crazy because of Arizona's emissions testing.
I currently have a new Edelbrock Performer Intake and Carb on the way, both of which are EGR equipped. So those are AZ emissions legal. I just need to know far I can go with a cam with the stock heads. Also should I just go ahead and replace the vavles, pushrods and rockers while I am at it? I would just get some aluminum heads, but they are a little out of the price range to put into a $900 truck that needs a ton of other TLC.

Any suggestions as to what cam kit I should look for along with what valves, pushrods and rockers would match up would be greatly appreciated.

2: Tires and Wheels:
The tires are also dry rotted, they hold air, but should be replaced. I figure while I am at it, I might as well replace the wheels. My question is what ones will fit. The truck is a 5 lug truck, what bolt pattern is it? I have searched and searched and found some places that say 5 on 5.5 and some that say 5 on 5. And clarification would be helpful.


That about does it. I am excited to be working on a project car again, growing up I had nothing but GM muscle and now that I got another I relize how much I miss my 84 Hurst/Olds 442 and my 79 Trans Am Bandit. I figure with the prices of muscle cars being rediculous, I can build a "Muscle Truck" outta what was someone elses junk.