Thread: Mystery heads

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Originally Posted by IC2

Look at his first post - "there a are no casting numbers or branding on them anywhere".

there not a Gm production head. the under side of intake runner and the added casting parting line on the ex side would not be Gm and added boss round the intake ports do not add up as a stock Gm casting or is that step O.D around the vavle springs or the in side shape of rocker valley of head . more i look at it the more it could be a World head it may or may not have a W cast inside by rocker boss s that and the fact it,s angle plug head i know Gm did sell a bow tie head in iron but i thinking it is a world or top pro line . casting shape is new looking and mounting points to be a old Gm angle plug head. i done and looked at alot of chevy small block heads .not a production head that i have ever seen . if you can tell me if it has bronze valve guides in the heads that could help narrow it down