Spring hanger/shackle pins

[Old Radio Tech]

1965 K10 Suburban with leaf springs front and rear. Replacing the hanger/shackle pins and bushings. Working on the rear. Got the front hanger pins out by hammering out from the inside (slide hammer did not work). I can't get at the lower rear shackle pins to hammer out from the inside without dropping the gas tank first. Before I start beating on them from the outside in wanted to get some feedback from the forum. Can the pins be removed from the outside in or will they get tighter with each blow?