Quote:
Originally Posted by Mick
It sounds like you are trying to lead me down an extremely geeky GM engine history road. This is a road that I will admit is at the very limits of my memory/knowledge. That said, the only GM "403" engine that I remember was an Oldsmobile engine that was considered a "small block" engine at the time, mostly 1950s? I even did a search, and apparently without more education on my part, I see nothing that says that a GM "403" was ever a big block. 
If I am sticking to something I know, C3 Corvettes, I'll stand by what I posted above. |
My mistake. 409, not 406. I recall a co-worker back in the 70s, had a 63
Impala with a 409 engine. Looked the same as the late 50s 348 block.
"W" heads (valve covers) on both.