1972 factory correct questions

[1972 Jimmy]

Hello All!
Need some help determining a couple of things to get my 350ci motor back factory correct for my 1972 Jimmy.

First, what are the correct valve covers. I have not found any good pics showing both right and left hand covers. How many holes are suppose to be in each cover and what are each of the holes for??

Second, what style of water pump came from the factory Short or Long?

Third, how is this motor timed? Straight vertical or from 2-3 O’clock position
Any Help would be appreciated!

Thanks,
Eric