need way more info than what modifications it has ... the add-on oil filter could be anywhere [but your P-bucket pics show it on the manifold, drivers side], and an electronic distributor would definitely be after market, in any early GM 6 cylinder ... what a 1950 should have is a 216, and it might have had a 235 swapped in if the mounts have been changed .... you need to get the casting numbers off the block and the number stamped on the pad beside the distributor [if any], then someone might be able to tell - also look for date codes cast on the block
Bill
