Old TRW Catalogue, Any body have one?

Nope.

The Shotgun engine was classed as a semi-hemi. Valves were in a different plane to the Hemi, see the pic.

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The engine you posted is a 429 SCJ.... The 429 Shotgun is the Boss 429.. Not the "Cobra Jet", not the "Super Cobra Jet"... The Boss 429.... And The Boss 429 is a true Hemi...
Ford had lots of engines hovering around 7 Liters.... When you saw a 7 Liter badge on a Ford you needed to know which one you were coming up against...

There were 427's... The first were truck engines... But in the passenger car world there were 427 Medium Risers, 427 High Risers... 427 Tunnel Ports... There were Side Oilers & Center Oilers.. Oh... Then there was the Legendary 427 SOHC AKA "The Cammer" (Also a "True Hemi" with a twist.. Overhead Cams)

There were 428's... Some came in Grandpas LTD... And some of those grandpa style LTD's were damn fast... There were 428 Cobra Jets... And Super Cobra Jets with the Trac Pak...

And as previously discussed there were lots of 429's...