First...
What Hair Trigger said above in his reply, #18
Second, it's your gun, and experimenting or modifying it is perfectly OK, a lot of now famous marksmen modified their competition guns. and wrote about their experiences, some good, some not so successful.
Having said that, if/when you sell the gun, an SAO hammer will not make your gun worth more. Likely it will be worth less to a collector, because it is no longer in original condition. Even the full kit will not make the gun worth more than the sum of the value in original configuration and an original kit.
Collectors will not pay extra for a Model 14 SA, unless there is evidence it came that way from the factory. Evidence, meaning a box with the correct label, or a factory letter.
In general, a collector will only recognize a gun as having the 3Ts, if there is proof on the box label, or a factory letter. Example:
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The Model 14 revolvers which were cataloged separately cost about $10 more in the early 60's ($90 compared to $81). More, meaning compared to other 6" revolvers favored by target shooters, like the K-22, K-32, and the base K-38. The difference in price was
not because of the single action trigger, but because the SA configuration included a target trigger and a target hammer.
Btw, the kits can be installed (by a gunsmith) on ANY K-frame with a compatible action configuration, not just a Model 14.
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