Correct Oil Dipstick for 1970 LS-6 Chevelle

[blackls6]

Can anybody help me with figuring out which oil dipstick is correct for my car?
I have two flat yellow tip dipsticks that look exactly the same, except one has different wording.
I also have the one that you can get from GM still which has the round tube handle!
Is one of them factory installed or from the parts department?
1) USE SE ENGINE OIL with E side ways.
2) USE GM6041-M-QUALITY MS with E sideways.

I also have a flat blue tip dipstick that has #1's wording, what application does this fit?
Thanks! John