Can I use engine assembly lube instead of camshaft assembly lube?

you can even just use a fair amount of engine oil as roller lifters really don't require assy lube, although it is better to be caught with than without. just use what you got and get that damn thing runnin already!! j/k
 
I think they are the same thing. In any case, it's just to get you through initial startup when the cam would otherwise be completely dry.

Dont forget to prime your lifters.