If you have a need for lazer cut valve cover spacers that will allow you to run roller rockers under stock valve covers, either for a S/B or B/B, contact Steve at [email protected] He also will make 4 bolt B/B spacers for 63 and earlier heads. I believe the cost is around $65.-$70. set delivered. These are hard to find and impossible for the early heads until now. Tell him Dave sent ya.