I am looking at buying a 327 with a TH400 and I have a Powerglide that I would have to sell if I got that combo and then I would sell the 400 also and get a TH350. How much would you estimate for the price of a Powerglide(works perfect, not show condition though)? And how much would a TH400 go for? The 400 is out of a '57 show car and is really clean. Thanks.