in researching the rebuild for my 430 i've come across a mechanic with a machine shop who i'm confident can do the work well. he's pretty close to where i live, open and friendly etc. he's offering me a warranty on the rebuild through the "engine and performance warehouse". the warranty is called the "engine pro protection plan" and warranties the work and parts for 3 years with unlimited miles [warranty is contingent on purchasing the engine kit from them]... this sounds too good to be true.. is it? has anyone been down this road? has anyone tested the warranty or similar ones?