if you dont have a wattmeter; how do you know the radio is only putting out 1 watt?
could just be that the internal meters need re-adjusting.
after major surgery like a re-cap, your radio ABSOLUTELY needs a complete alignment.
your best bet is to send the radio to a good shop to have them give it an alignment, (not just a "peak and tune") and they will be able to tell you if there really is a problem with it.
it would be a good idea to thoroughly check all the new caps to make sure you put them in correctly with regard to the polarity before you send the radio to a shop.
if the tech at the shop has to search around for a backwards cap, its going to cost you some money.
when you say that you replaced the driver, final and regulator; what parts did you replace them with?
were these parts from a used radio?
where did you get the 2SC1969 final from? (there are lots of fakes out there)
my personal recommendations for a shop would be DTB radio or Sparky's CB
many of the "truck stop" CB
shops dont know how to give a radio a complete alignment even if they did have the required test equipment.
you definitely need a reputable shop.
if you run into problems, PM me here on the forum and i will try to help you out.
you have a great radio there and it deserves to be healthy! LOL