Engine numbers

sorry for the late reply as ive been flat out, who said the christmas break was a time to relax, man i havent stopped . I cant get under the car to check that c273 number at this moment as ii have the rear end on stands and i havent the room to move around but i will check once i put the rear wheels back on and move the girl.Once again i would like to thank you all for your input and specialty Cudamark for going out of your way to provide that info for us.Thats why i love this forum any problems or info needed there is always some one out there who has come across it or has the know how.!!!!