Wow this is a great thread, thanks for all the scans, especially to bubba for the 3x1 article very good info. Being in the Bronco community I've heard plenty of praise for Bill Stroppe, but had no idea he was in on this stuff.
So if Stroppe sold his 3x1 configuration to Ford, and H&M and Edelbrock configurations were similar, what happened to the latter two? How and when did Offy get involved?