Educate Me About Swapping Cam

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As the title says I plan to do a cam swap in my trucks 350 engine .Its on a stand in my shop and everything is off except the timing chain and the intake and distributor and the heads .I plan on putting a 290 HP stock cam in place of the hotter cam currently.It did not smoke or use oil just leaked at all gaskets due to sitting 15 years .I have a cam that was pulled from a new 290 HP crate motor not run but he seems to have shorted me the lifters .Can I buy just the lifters and use with this cam or should I buy a cam and lifters together ? I have never done this before but one of my foster boys says we can do it .All ideas and advice is welcomed .