I have a hp 440 engine that I think came from a c body. I’m not sure maybe y’all know. The number by the oil pan is 9D257xxx with the last six being serial number and 9 for 1969 does the D mean Belvedere? Didn’t Belvedere just build c bodies for 1969? My car is a b body. Also the engine had six pack rods and a six pack cam when I had it rebuilt back in the 90 s. Any help will be appreciated.