According to the research I've been doing there are a few things to watch out for when using these heads. First you can't use a roller cam the heads are only compatible with flat tappet cams. As far as the bolts go i know there are two sizes that are found on these Ford small blocks. I believe they're 1/2 inch and 7/16 inch bolts you'll need to know which size your block uses. I believe the ARP bolts shown here are 1/2 inch. If your block uses 7/16 inch bolts you will need to find an ARP kit with that size and use edelbrock part number 9680 these are bushings to reduce from 1/2 to 7/16. Hope this helps good luck with your build.