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yes they are the later version stock heads, ld4b intake, which i have

thank you for the info, i will check clearance when i get the heads back

thank you toolman, that is exactly what i have!

i am rebuilding a 1967 high performance plymouth 273. everything checks out that it is the hp version. when i took the old pistons out they were the flat top standard non hp pistons. the engine had been rebuilt at some point and bored .030 over, it does not look like any of the decks were shaved...