[Excaliber]

I would think the 1955 Vette had the first Chev small block, 265 cid. I was not aware that Ford had it's Y block any sooner than 1955 either. I guess were talking "months" or even "weeks" here as to who was first?

And,,,, first year offered in a production car (1955) or first year ran in an experimental (research) car?

272-292-312 Y blocks, what a disaster of an engine!