[AnthonyS]

Hi sYc Team, quick question as above.

I am aware of the below casting numbers but are there any other casting numbers for factory GM BBC square port Winters' cast BBC HiPo heads known? From back in the day I mean, I know there were some GM Performance numbers too later, also with the later part number config like 123...

I'm wondering on ones cast in the 60's - or if any were recast later with old casting numbers / old dates... I think when the blocks were cast later they were of a slightly improved design and were dated currently... did that happen with any aluminum BB heads too?

Numbers I know of for 1960s BBC aluminum heads:

3919842 / 842

3946074 / 074

and the non assembly line - production OTC 14011077 / 077

Wondering if there's other Winters produced casting numbers out there, thanks in advance all.
Anthony