im not certain...but my setup is from the early to mid 90's...dont know for sure...but is that band issue something new or old......i doubt i have that setup..and yes im on my 2 nd motor with the same guts in the tranny........and 391 's and never hurt anything.....now my new motor has alot more grunt though....500 plus.....but so far i havent hurt anything yet......but i do know im changing out vb so i can get the manual forward pattern... i want to keep my interior stock appearing, and use the slapstick.....not sure if that band situation is a something i need, or am willing to pay for....if its the same money for either way...then ill problaby go with that....any more input fellows is appreciated