thers no vacume leaks.. and strong vacume..
i did install the shift kit and it was installed then with out useing it for 4 years it sat... while we did the body and other werk.. the tranny was froma 74 impala and shifted fine.. but then that was 6 years ago that we drove that car.. and all shifts are late..and its a manifold vacume i belive... its my dadas truck.. thanks