Hy stalker21, numbers that are raised above the surface are casting numbers, numbers that are flush with the metal have been stamped into the block and are usually an alphanumeric code to identify that particular parts original application. From Inliners International I found the following info, casting number from cylinder block
8764476 no record, however there is a casting number 3764476, which is a 1958-62 235, please recheck your casting number
cylinder head casting number 3836848 is listed as being from a 1956 235, however it seems to be a consensus that this head was used on a lot of newer engines as well. Please remember to tell us what year and size of truck you're asking questions about in your posts, hope that helps.
