please give input guys. I have a set of cast 3856206 dated a135 and b85. they are currently residing on my 396cid engine. In an effort to make the car more correct, i am removing them to get a set of correct cast date heads and plan probably keeping them as a spare set. my question is this. is there any reason to assume these heads for any reason would see a higher resale value due to age, cast number, rareness etc. I know all the specs what they belong on valve size cc etc. just need feedback thanks team chevelle.

Shouldnt really bring anymore $ than other closed chamber big block heads, other than the fact there the smallest chamber head for compression help. Really not much off a 66 #702 head. But the heads wern't used on the more sought after cars chevelles, camaros, corvettes, etc. like the 66-70 closed chamber heads. The #206 was only used for pass car applications impala, etc.. The 65 vette, chevelle 396's used the #208 SQ port head.

thanks supersport