Re: 1951 288 - Head and Manifolds - Nut and Washer Grades

Posted by Packard Don On 2024/7/24 18:04:16

The engine probably has rolled threads where the studs go into the block so important to not run a tap into the holes or use modern over the counter studs. As for nuts and washers, Grade 8 wouldn't hurt but might be overkill and finding them with the 3/4" hex might be difficult as it's not a standard size for that thread as far as I recall. I think 11/16" is the standard size.