If you do change all the 'potentially bad' caps then please do them one at a time and check the radio afer each change. And only do this after completing safety checks and changing 'that cap'.
Better still download the trader sheet and follow a guide like Paul's
http://www.vintage-radio.com/repair-...ion/index.html
Also check out the book in the sticky above.
By changing the caps one at a time and following the Trader sheet you will learn what they do and hopefully see performance improve as you go. It will also make fault finding easier if you come accross a problem.