Hi Ken,
Welcome to the Group. The RPM that you are getting is correct, they were always a fairly high revving engine and whilst some have fitted various different 5 speeds that will take off a few hundred revs, some here think that the engine should be driven how it was designed to work, i.e. higher revs. Also as an Auto, the vehicle will always start in second with the stick in forth. If the gear lever is pushed forward to 2 then it will start in first.
Have a good read through the Tech Manual and also try out the search engine on RPM or similar and you will see lots of posts on the subject.
Add some photos in the Photo section of the Forum for all to see, everyone loves a photo and ask questions as needed, there is a wealth of experience here on these cars.
If you feel that you are getting value from being here then feel free and I encourage you to join as a full member for a small annual subscription that contributes to the running internet hosting costs of the Group given that all positions are voluntary. (I had to get that plug in as the Membership Officer for other than the Americas)
Garry