Re: Resurrecting a 1951 Henney-Packard Parts Car

Posted by HH56 On 2024/3/31 20:35:28

Don't believe there is any trick other than the cut and rolled threads are not compatible. The way I read the article which is on page 101 in this counselor, by the 23rd series all engines should have had rolled threads. I would wonder if at some point when Packard parts were not as readily available rolled thread studs were NA or hard to find and someone tapped the block to use the other studs. Does a regular stud or an ordinary bolt thread in? Out of curiosity what is the casting date of your block?