Hot Rods 1952 GMC pickup 4 speed gasket kit

anyone out there know where to find a gasket kit for my truck. Seals leaking bad after sitting for 25+ years.
Thanks!
Mark

 

Is it an sm420 transmission? You can get a rebuild kit with the seals on eBay for about 130 and I bet you could get the seals from the auto store if you pulled the leaking seal out and get the part number off of it

 

http://www.rockauto.com/en/catalog/...,1440373,transmission-manual,gasket+set,10595

http://www.rockauto.com/en/catalog/...smission-manual,main+/+output+shaft+seal,8792

they don't have a seal on the input shaft. Also look at it to see where it's leaking, there are other places that could be causing problems that aren't sealed with a gasket or seal.