I was thinking more along the lines of pushing (forcing, really) a wooden dowel, maybe even a pencil, into them and pulling them up.
Also, if you're seeing those top bores sleeved, what you're trying to do has already been done. As manufactured, the 1st/2nd gear detent pins are directly in the aluminum casting, the SIB is to fit those bores with a coating-lined bushing sleeve.
And, the top ones are the easy ones...
I suppose you're going to want to see pictures...
1957 Austin-Healey 100/6 Wine Red
1961 McCulloch R1 go-kart Screaming Yellow
1999///M Rdstr Cosmos Black Eurosport Twinscrew S/C
1999///M Coupe Estoril Blue Eurosport Twinscrew S/C
2001///M Rdstr Steel Gray
2011 X5 35i Sport Deep Sea Blue/Cinnamon