AB valve replacement
I just bought an AB, with what I think are early 2000 vintage tubes. Two of the four valve stems are broken, so the springs are missing and they don't seat at all times. I wanted to replace them, so bought replacement valves. These are the 2 part valves that screw together and sandwich the hypalon between them.
The actual AB ones are fairly expensive, so I got some more generic ones that are a very close design. However, the thread pitch isn't the same as the AB, so I can't reuse the inner valve basket in the tubes.
Is there any way to get the old baskets out and the new ones in without cutting a larger hole? I can't seem to find any information on this. Is my only option to just buy the more expensive valves?