Ok I don't want to spread bad information, I have seen an adjustment on the push rod from the booster but I just went thru my FSM and I don't see a spec. I have done this on a B body and the spec was in an old Motors manual. So you could maybe call Cass at Dr Diff and see what he says. Also follow advice others gave about loosening the m/c mounts when this happens and see if they release. As I said I don't want to give bad info. Sorry.
