[R-390] Caps

[Johnsay Johnsay]

I actually enjoy esoteric discussions about components.  Not much of this was covered in school.  There is a pretty good discussion on the subject of film caps in Wiki.
I had planned to replace most of the caps in my '54 Motorola R-390A with 400WVDC Panasonic PP metalized film caps.  Although conservatively I was going to use a 600WVDC PP film cap "Sprague OD"  for the filter coupling cap.  Has anyone experienced failures with caps such as these used for replacement purposes?
John,  W8KX