This plate goes between the transmission and bellhousing to space the standard lenght input shaft back so that it will work with an FE bell that has the car toploader spacing. The plate is 3/4" thick. There is some grinding that was done on the inside where the transmission bearing hub goes as it did not fit correctly. This was mocked up to a TKO600 and a lakewood bell for a 460 Ford. I never actually used it, just mock up and has sat on the shelf for 15 years. $110.00 shipped in the lower 48 states. thank you, Steve