Powering LC+

A Z1000 would be able to handle two engines just fine. One thing to consider though is if you kept the blocked sections and one train shorts (derails, etc) the other will keep going, avoiding interruption to the entire layout.

If you're already set up with the blocks, there isn't really any point of changing things, just turn the throttle all the way up on the Z1k and you're good to go on whichever track the LionChief engine is on.  If the LC engine will be crossing between blocks, make sure the throttle on both transformers is set to the same level.  

On the PH180, I think this is the best power source on the market right now.  (ZW-L excluded; It is probably better than the PH180, but is not very cost effective)  A single Z1000 will run 2 LC+ engines just fine, a PH180 however provides almost twice the power of a Z1000 and offers a much better circuit breaker...

In the end, I think your best corse of action is to keep everything set up as is.  The two Z1000s will provide the same power as one PH180.  Park your conventional engines on sidings, or remove them from the track, turn up the throttles on the Z1ks, and have fun running LC+.  

JGL

Thank you both for your views.  Much appreciated.

I'm currently running three LC's simultaneously off a single CW80, so a Z1000 should easily handle it.

IRELAND,

    I do not remember exactly how much voltage a Z-1000 delivers to the tracks when the Transformer is turned up to the max, remember however the LC & LC+ engines are to be run 18V and under, or they can be damaged, according to the Lionel directions, that come with these type of engines.  Set your Transformer up to deliver just under the 18V, to safe guard your engines, no matter which Transformer you decide to use.

PCRR/Dave