727 selector seal

Ok Tomorrow I plan on ordering my Trans go TF2 shift kit,found a tranny shop that will get it for me.So whan the VB is out I need to replace the selector seal. Now is there 2 seals,selector seal and kick down seal or does the selector seal seal booth.I replaced the front pump seal last year,what outher seals should be replaced when the kit is being installed.I have a tranny tech friend that is going to do the work for me.So I need to know just what to order.Thanks all.:cheers:PS he says If I got the B&M kit go else were.