You can take #14 & #15 out,,the ejector sears, along with their small coil springs.
Put the sear pin #17 back into place just for looks.
The kickers/ejectors will act as extractors at all times that way as they will never cock and release to eject the fired case.
Easier IMO than wrestling with the ejector springs.
Don't know if removing the entire kicker assembly would make it an extractor gun but:
You can take the entire kicker unit (No's 5,6,7,8,9,10) out by simply removing the cross pin #12.
Part #11 then fall free from the shoe, so don't loose that (don't know what it's called but it's beveled edge lifts the kicker unit up to clear the kicker sear(s) as the gun is opened)