Leaky capacitors need replacement?

yes for sure they do

I should add I would be most happy to put something in that might last longer.

Just get the Nichicons I linked to for $1.13 each, quality cap and will last longer than you and the next owner will probably keep the amp for anyway.
https://www.mouser.com/ProductDetail/Panasonic/ECA-2VHG330B?qs=sGAEpiMZZMukHu%252BjC5l7YR8X6v1kBION9...
Cheers George

Ok, thanks, will do!  I have a bunch of soldering questions but I will do a lot of research online before I try it out on the amp.  If anyone wants to help out:

1. What can I use for extra hands?  I would say that is 1/2 of all of my soldering problems -- not being able to hold everything together so it doesn't move when I apply the solder and all the used-to-be soldered stuff is now free to move around. 

2. What can I use as heatsinks to keep the heat to the area where I am soldering and not running out to other solder joints through the wires?

3. Is regular boring old solder from a plastic tube good enough or should I go all fancy silver solder?

I guess that's really all the issues.  :D

Try this https://www.quadhands.com/products/quadhands-workbench

I got mine on Amazon, and it has made soldering much easier.

or parts connexion