It looks like a roll pin
I have not looked at manual as get
But I would make a puller
if that hole goes rite through
get a bolt that fits that you can slide a piece of pipe over
YOU will need some washers
and a nut on the other end and tighten slowly and see if it moves
NO hammers if possibly
be back to you on this
I have a 69 I will be working on tonight I may be able to help tomorrow
Bfit