Thank you everyone for all your help!!!
ericgibbs: I use a 40amp 300v dc SSR to switch dump load on and off, so I should be good. Also they will all be mounted to a large heat sink since I made the case for the PSU out of heat sinks.
EternityForest: yes the two switches that control the HV and LV modes can not be activated unless the opposite side is off. So if I have the LV side switch in the on position it will only actually turn on if the HV switch is in the off position.
Gary B: I am using two DPDT switches and some relays and an SSR to control instead of a 3-way rotary, sounds more difficult then it had to be but that is what I had. And as far as timing I am not flash gordon so I figure it would take far more then 1 second to turn off one switch, switch output cables(since no 1 load I use will need HV and LV), and then turn the other on.
Keith
P.S. I am really glad I gave this forum another try. The first time I came here for help was about this power supply and I was told it is not possible and will blow up or worse!! Well, guess what, it works flawlessly. So again thank you everyone for all the help.