More info would be helpful.
I am editing my post because I thought you had an 8 cylinder (DKB is also an 8 cylinder suffix) but now believe you have 1973-79 or 1975-85 250 6 cylinder.
You'll find your casting number on this page if you look hard enough about half way down the page.
http://www.butlers-a1.com/chevym.htm From the stamped number, I believe the
"F" = Flint production plant
"01" = January
"02" = 2nd day of month
"DKB" = 250 cid with TH350. (according to this nova site, look at the bottom of the page under "1979")
http://novaresource.org/codes.htm Someone may have better info to share but I think this will get you close to where you need to be.
Hope this helps.
