I have a Ruger 220Swift tang safety model that you cannot open the bolt when the safety is on. Can it be altered so that it is like the later TS models that you can open the bolt while on safe?

Yes sir, you just need to grind the bolt lock down to make it clear.

Thanks bigmac. Are their any instructions anywhere, or can any smith figure it out?

I did it on my FIL's Ruger and it's pretty easy.

Thanks, I appreciate the help.