I am having a 235 built. It has a casting date K216 which I translate to November 21, 1956. The stamping on the serial number pad is F1127A. I translate this to be Flint, November 27, and the A means standard 235, model 15-21-2400. See this link
1957 235 identification It had solid lifters. Is this a truck motor or a base model stick shift car motor?