Killer amp, I'm still using one hooked up to 12 speakers in my ambulance. I've been using it on and off for 18 years and it's still completely bulletproof. Free bump.
In high school (it's been a while...) a friend and I installed a Kraco cassette deck in his Plymouth horizon with electrician's tape and styrofoam. It'd slip it's way out on washboard dirt roads but it worked for years.