I asked this question on the 1911 Forum also. I recently acquired a Springfield GI WWII .45. The standard spur hammer and grip safety bite me, especially when shooting hotter factory ammo.
The question is can I used a Colt Series 80 Commander hammer and Series 80 dished gripe safety SAFELY on the Springfield? I seem to remember a gunsmith telling me that the Series 80 grip safety can be used on a Series 70 style pistol. I don't recall him saying anything about the hammer.

Thanks in advance for your help.
Joel