If you were to call tremec they will tell you to not use the stops. thier trannies have internal stops. even the t-45 I do belive. I used the stops when I installed mine hurst as I did not read any directions and know how to ajust stops. I have never had any issues.
That being said if ajusted correctly and secured they are no harm they are just redundant. Tremec's advice is if the shifters stop are not ajusted poperly you can damage the tranny and since there are internal stops you don't need them.