I have been putting together a radical stroker,(as far as my unradical budget can afford) that I plan to use at some point, the block is at the machine shop and seeing that it has been rebuilt twice the cylinders are getting thin, the machinist says we may have to sleeve it....should I just get another block....this one was magnafluxed and everything is sound, but for a security measure, given the big bore, he wants to sleeve it.....any thoughts?