The switch is easy to mount but you need to get the correct bracket, That motor home should have it if it's still available. I went to the junkyard and got a gas pedal from a "B" body 70's car and it bolts right up in place of the 80's bracket. There is a mounting spot on the bracket for the switch. The transmission should upshift with the module but it won't kick down to a lower gear when you mash the pedal, that's what the switch does, it will just bog in whatever gear that you're in. They do make adjustable vacuum modulators for the TH400, that's what i had on mine, take the vacuum line of the modulator and get a long skinny flat head screw driver and stick it in the hole and try to feel for a screw, that's what adjusts the shift points. In will hold the transmission in gear longer and screwing it out will make the transmission shift sooner. If I remember correctly, it's been a while. Usually the smaller aftermarket modules are the ones that are adjustable. The big bulky modules are the factory ones and they are not adjustable. I used an adjustable one from B&M for the TH350 because it's smaller and gives more room for headers.