I found a Marti report on the web for a 67K code fastback
472,209 Mustangs produced in 1967
71,062 were fastbacks, of them,
319 were built with the Hi-Po engine
205 came with a 4-speed manual transmission
Add in coupes and converts I think the total K code Mustang build was a little over 400 in 1967
I think Ford directed most of the Hi-Po engines to Shelby in 1967
I’d love to buy a 67 K if anyone was aware of one for sale.