Seat foam?

Glad someone made this thread, i have a couple of questions.. i have my seats down to the frames/cleaned and painted (had to remove some rust... every inch of this damn car...) anyway.. no one makes stuff for 62's, i am just curious if there is a particular weight HF foam to use? 2" for the bottom and backs of seats?
Sadly my seats didn't have original covers, a friend of mine is a seamstress and will be making me new ones but we are arguing over the edges (bench seat) I swear they have piping, she says it's welting.. if anyone has a 62-65 bench laying around, could use some close ups of the edge around the front.

Sorry if this is derailing.. didn't wanna make a whole new post for this :)