Has anyone used the tranny poston's offers. Is it worth the money, and would it be better to use than just having a tranny shop do a stock rebuild of my tranny. Also is there any other companies out there that would send a tranny to your door that is built up a little like the postons tranny? The cars main purpose is going to be drag racing and i am planning on going alot faster than the time in my sig so I would like somthing that will last a while and shift quick.