Mack, If you can tell me the casting # I can tell you the spec's for the heads are.
Will they fit a 283 ? YES . The casting # for the block would help.
George Hood


1965 C-10 fleetside shortbed BLACK
82 c-10 longbed 6 cyl.
58 Lincoln 2-dr coupe Black w/white & blk.
59 lincoln 4-dr. parts car