New to AD trucks and the forum and could use some help. Have recently purchased a '49 five window 3100 which has had the engine changed. Was told it was a 235 replacing a 216. Just trying to identify the current engine. Block casting # 3769716 , the head # is 3836848, the stamping on the flat by the distributor is FC 409J. The valve cover is held on by two nuts. Any information will be appreciated.