Engine cam break-in - What should I do with my 340?

Hey, as some of you may know, Im restoring a 1968 Dodge Dart GT.
The car will get a 1971 340 in it, and I took the engine apart to inspect it (it hasnt been started since 1981...). The inside looks good (I think the piston ridge was less than 0.001"), but I want to treat it to some new bearings, piston rings, gaskets etc.
I also thought I should install a new cam while I have the engine apart.

This will be my first flat tappet engine break in, and as I understand it the engine need to be revved to 2-2.500 RPM straight away to get the oil pressure up so the flat tappets and cam can match properly, and run like that for ~30 mins.

Now, the problem is, the engine came without both a distributor and carb, so I will need to get new ones. And when installing those, I dont know how the fuel mixture will be, and I will probably be off on the timing since I dont have an existing distributor to pull off, and make sure the rotor is set the same.

So, setting both the carburetor and the timing will probably take some time, time that will be spent on both idle and higher revs.
Will this matter much for breaking in the cam?
Should I instead leave the current camshaft in the engine (the camshaft and crankshaft have not been removed) and focus on setting up everything else on the engine, and install and break in a new camshaft later on?
Since I havent touched those two I will probably have the cam degreed right, so that will save some time. Then I can focus on getting the timing and fuelmixture right, and after that change the cam.

It will be more work, but perhaps its the best thing to do?
Advice?