There were 2 different shrouds for 65/66 early A’s - IDK if a shroud was even available in 63/64 unless it might have been fir a HD cooling option. If so it would have been the 19 inch version as the 22 inch radiator wasn’t available until 65. Generally speaking in 65/66, slants got a 19 inch radiator with the corresponding size shroud whereas V8’s got the 22 in radiator with the corresponding size shroud. FWIW I’ve never seen a factory 22 inch slant radiator in a 65/66. Additionally, to secure the factory shroud with the factory brackets, the user needs to have the correct radiator side panels to install the brackets
