I'm gonna think long and hard before I change anything.
Judging by the tuning chart this thing ran with about 40 watts input to the 807s, but it was made to do it 24/7 for years at a time. I could change to outputs to something else and use a bridge on the plate transformer. It's rated at 400 watts continuous @ 600 volts and 670 ma. Full wave bridge would give me about 1,200 volts with a choke input filter (the secondary is 3,000 volt test) and I should be able to pull about 500 ma for 600 watts intermittent; I'd have to be careful of really long transmissions.
There are no power ratings on the modulation transformer, just impedance values.
Does anybody have a good Peerless listing? These transformers use numbers that don't match what I can find in catalogs. They have very low serial numbers (some matching), so I'm thinking that they were made for this contract instead of being stock transformers.
It'd make a great transmitter, but I'd hate to really modify it. If I do, I'll figure a way to do it with the minimum of butchery.
It'll be at least a year before I catch up on other projects and get the shack, with the BC-610, on the air. This one is way down the list.