This is a 265 and Powerglide from a 56 Chev wagon. Original to the car, never been apart. (Till I cut the body off) I noticed this plate in between the block and the transmission. I plan on using this motor in my 57 wagon. I may use this powerglide, but im not sure yet. I'm assuming a 350/400/700R trans will bolt directly to the block, Whats up with the plate in there now?