OK I should have known to read first but in and attempt to prep my 235 block for its visit to the machine shop I removed 1 of the round head bolt that holds the oil pump housing to the block. It some how seemed wrong so I took the time to read our FORUM topics to find out they should not be removed. Question...how do I put the round head bolt back or can I use a grade 8 or 9 bolt in it place.