Magnum Motor Rebuild Questions

Ok i've decided against working with the 360, to make the swap worthwhile I would need some heads that breath better than stock, and when push comes to shove its a 4500lb grand cherokee daily driver.

Have a line on another 318 magnum for 150 that I will probably pick up this week. Trying to line the parts up now. Have also decided to forego any performance mods other than cleaning up the heads by hand(i.e. nothing invasive)

Rebuild kit(hard part sizing will have to wait until the motor is in the machine shop to figure out if bore needs punched or if I need over sized bearings.

http://www.summitracing.com/parts/FEM-MKP6334-000/KitComboContents/

Let me know what you think of if you know of a better company or kit to buy

Question:
Does lifter noise mean that I should buy new lifters or just that the heads need gone through. Are lifters generally something that you would recomend replacing during a rebuild? I'm betting that between the 2 motors, 1 of the cams will be good.