Re: Length of head studs above the block

Posted by HH56 On 2015/3/14 23:53:03

I don't recall ever seeing a spec. Believe the studs were threaded into the block until they bottomed. There were different length studs and also different thread studs were phased into production in the late 47 early 48 period. Packard said the different thread types -- rolled vs cut threads -- were not interchangeable. I wonder if the last time it was apart someone subbed some wrong studs that won't thread properly or possibly the holes into water jacket are rusted and studs can't thread down. If that is the case be careful or you might break a stud. If you do set a firm distance for all, don't forget you have to allow for anything that has to go under a head nut. Not sure what all might be on a 49 head but I believe the coil and ign wire bracket is one thing that has to go under a nut. There may be others.