This came from alpar.
Unlike earlier performance engines, the Street Hemi came down the line complete with
exhaust manifolds; the Cross-Ram engines had to have their manifolds fitted later. The combustion chamber had been tilted to prevent the exhaust rocker from being too long, resulting in a narrower engine, so they could do a
standard bodydrop in the
Dodge Main factory.
As I said earlier I read this 50 years ago. Many may remember this was before Alpar and the internet.
