4-Door with 340 from the factory?

GTX JOHN said
Mopar Perf. had a 74 (I think could of been 75/76) test mule Duster.
with a big block in mid 70's They put glass bumpers on it and got rid
of the Energy absorbing stuff. As I recall ( I am old) = It ran 11.3 with a very mild
400 and a 571 lift Mopar cam and 11.6 with a 509 Purple shaft. I probably will be going to
dinner with David Hakim at the Winternational in a couple week and I will see if his memory
is more exact than mine. They used it as a test bed to check out a lot of Mopar Perf. stuff

I remember the chart which may have shown the results of 4-5 different camshafts. It's probably in one of the thick, Direct Connection race manuals with the many different chapters, including big blocks.