cannot figure out what engine i have

[lt704]

Hello folks, I am having a difficult time reading the numbers on the plate behind my alternator for my engine suffix code, it is not the original engine. I believe it reads V0202PRT. I have looked in all the books and codes but cannot find the Suffix code for PRT or it maybe ART. The back of my engine has a casting # of 04010207 which is a 1980 to 1985 engine and the heads have a casting #14079261 which is a 1982 to 1985 engine. Anyone know what the two suffic codes i mentioned could be ? PRT or ART??? And also is there any trick to help raise the #'s in the plate behind the alternator so i can make the codes mor legible? Thank you for any help that you can give me Russ