The E55 had a 340.
After they ran out of 340's they brought out the slower 360 E57
You could get the Charger 770 E55 SE (the collectable one) in VH-VJ and the E57 in VJ-VK. After VK the biggest and only V8 was the 318 Fireball
First one: Who knows! they have no pictures and very little info to back in up. you would need to see the option plate on the firewall.
Second one: the 360 would have been put in later as it is a CL and you couldn't get a 360 by then. you would have to check the option plate. it would have a K option, the K means police special.
it is probably a K16 which includes the 318 ci, 16:1 ratio Steering Gear, B12, C63, D75, F22, T15