Rear End Question..Posi or slip... Please Help..?

Alrightyyy soo i got a 82 z28 camaro it has limited slip... im wondering if its posible to swap the internals from limited to posi?? reason being is when i tromp on it one wheel goes... it just really dosnt feel right iv herd that ill get barking when i go around corners if i get posi... or if i weld it and i wont do that for sure.... iv also herd that there is a such thing as a locker?? that locks it in place?? i just really dislike the limited slip... anyways if you can help me out with some advice or somthing that would be great :) if your just going to get all frisky and up set and get pissy please dont reply... sorry to be so rash but people seem to do that lots on here!!! thanks!!