Any ideas on how to safely remove valve guides.... The top of one is cracked has to come out....I fashioned a home made puller using 38 threaded rod and a rounded off nut that would pull the guide through block....No good....I could try a stainless threaded rod.....Im using a old hub on top of block to spread the load and it has a nice flat shoulder that lays flat against block......Im. very worried about damaging this block
Any ideas?