I just installed a new custom trigger that works fine and has a real light pull, but thats before I put in the grip safety after I put that in it wont cock anymore anyone have an idea whats wrong with it?
Simple enough fix - change the hammer or change the grip safety. Of course, it's not really that simple, because changing the hammer requires matching it with the sear, trigger, and thumb safety. Changing the grip safety MIGHT require recontouring the frame.
It's your call, and there are others here that could help you in picking a new hammer and/or grip safety, but my personal choice would be to change the hammer - unless you're insistent on having a spur hammer, all the filing and stoning will be internal and will not affect the frame.
The trigger, hammer, sear, disconnector, and thumb safety are all interrelated. If you swap out any of those parts it will definitely affect the trigger pull - someimes positively, sometimes negatively.
Well, not so much the trigger but it's still part of the equation. The point is, you can't have a modern beavertail grip safety with a spur hammer. To use a modern beavertail you can bob the hammer considerably or switch to a commander-style or newer style hammer (I like the McCormick myself). To use a spur hammer you can put in a GI grip safety or one of those safeties made specifically for a spur hammer.