1971 Duster 360/727

Not much has happened, I have 0 motivation for the car.
Anyway, I called a guy that had some heads he wanted about $1000 for. He will do all the work on them before shipping them to me. He was talking about the valves and said it was better to get 2,02 + 1,6 valves instead of 2,02 + 1,8. Is this true ?

He also said something about that I should get adjustable rockers because the Engine is not original and he did not know how much to Mill the heads to get proper pushrod/valvetrain function.

I checked on ebay and that was some expensive rockers+pushrods and I have no idea what to choose either.

Im having trouble relying on people more and more so Id be happy to get some response on this, he might just as well try to fool me.

I am finally getting the rest of the parts back from the machine shop as well, ive waited since April. Hopefully this will give me some motivation to test fit Engine mounts, block and headers.
Snow has started falling too, so I wont get to test drive until spring.