Yeah, those date from 2008, whereas it seems the 738BCF are from 2016. So I'd go for the airbus aircraft. More in line with what's already in the fleet - and they're conversions, so they could be older planes from the fleet that are to old for passenger service, but still useful for cargo use.
None of the Boeing freighters have a passenger equivalent in the fleet - the 600 is not in the freighter lineup, and the 738 is not in the fleet at all.

There are A320P2F and A321P2F

In my mind, Tasman's operating area is the pacific and eastern Asia. Anything outside that would be unusual.

Yes, they are fairly old. Is there cargo A32X planes? The big birds should be fairly rare.

Yes they have, but unfortunately I have almost no knowledge about aviation so I guess A300 and A310 are old ones.

As said, I don't use tweaks, so cargo is out of my gameplay. Does the tweaks plane pack have airbus cargo planes? I'd look in to them if it does - and remember, OLDER planes. Tasman is not a wealthy airline ;)

Don't worry, I didn't change anything on the original airline, this fleet is still vanilla.

About the cargo fleet, as I got the fleet from space, I had the same thoughts it doesn't fit in to the description. If you like an other cargo fleet let me now and I will look what I can do.

Just a comment also about the aircraft in the cargo fleet: The idea behind Tasman is that their fleet is mostly older airbus, with older 737s to make up numbers (and a bit of variety). The cargo fleet kinda ignores the airbus idea.

I hope you don't make tweaks required. I would be kinda miffed if you did, because then I wouldn't be able to use the airline I suggested, as I don't use tweaks.

Just a new cover at the moment, there might come an other cargo subsidiary.

What was the update?

Can you make a cargo subsidiary? (tweaks allows for cheaty cargo flights)