4.1 block ??'s

[Super6]

I just got a 4.1 block from the junk yard. It has the 6293 heads but i couldn't find the block casting #'s on gnttype anywhere. casting # on the block is 25514291. It is somewhere between 80- 82 year model. anyone run across this casting #? thanks Bob

 

[turbojack]

4.1 block #

I just got on from local yard. Heads were 25506293, Date was 4/82. Block was 25506484, date ???.Block was blue/green and heads black.Was told block 83/84. Real mystery here.83/84 blocks have .625 oil feed hole,older ones have .500 oil feed hole.Hope this helps ya. By the way, mine has lrg. oil feed holes!!