I'm having a big block stroker motor built that I'm guesstimating will be about 600 HP. I have a currently stock 727 trans. from a 440 HP motor that I will be using with it that I need to have gone through and upgraded to handle the increased HP. I've never had a trans. done like this before so I have no idea what to expect price-wise. I haven't got any quotes yet but if it's like everything else, I expect there to be a range in the prices I am quoted. So what I would like to know is, what do you think a fair price would be to have this work done?