Anyone running a th400 in their a body?

a full tilt 727 for my hotrod cost in the $9000 range. I have the convertors and flexplate. a powerglide cost in the $6000 range and I have to buy a convertor, flexplate, a shifter, cut the driveshaft, new front yoke, new cross member and an adaptor. so the cost will be a little less to about the same. at these prices and the parts in each they should be equal in horsepower output, strength and speed. there is no reason to even attempt to use a 400.