400s double dog needed , naked

[landlubber]

doing a nice  p 447 upgrade/conversion with upgrades , double dog would be nice ,  thx jerry 

[Swami805]

Some of the no letter 400 series came with double dogs like the 500 series   I don't know what percentage of them. The ones that have 2 will have big bearing cups and slotted screw heads but that is no guarantee
Shouldn't be a huge diy project if you're handy with that sort of thing which I'm not
You have a P series, the no letter bridge will drop right in but the  P gear sleeve won't fit so you'll lose the under gear drag washer
I can take some pictures of a 2 dog bridge so you get get an idea of how it works