A body BB manifolds on ebay
Just to reaffirm some of what has been said here...no, $7500 is probably not a typo. If anyone is doing an "M" code RESTO...and I emphasize RESTO...will want manifolds and not headers. Headers did not come on these cars from the factory. Maybe ask "rlcbit" on here as he's had a few of these "M": code cars (has one for sale right now). $7500 maybe a bit ambitious, but they are pretty nice.