[421-6speed]

Nice score... Looks pretty complete and appears to have a small base carb which is a hard piece to come by.
When I rebuilt the engine in my 60 Ventura I machined my timing cover to accept a lip seal. I did mine a little different then Bills outline using the 63-66 timing cover seal as I did not wish to bore all the way through the cover and wanted a lip to seat the seal so I spent some time matching up seals until I found National seal 710356 that had the same ID but a smaller overall OD and depth witch allowed me to leave the lip inside the casting. I also did a speedy sleeve on the balance and made a centering tool for install but guess I didn't take a pic of the centering tool. Here are a few pics.