Wonders will never cease. I found the report straight away!
2 pages with old faint photocopied profile diagrams - unscannable, sorry.
But they show that the turret fits on the (essentially Conqueror) turret ring, with the Commander and gunlayer alongside the gun. The large square part at the back houses the breech and two loaders; it's high enough for them to stand up.
One page of data, summary herewith:
Crew 5 Commander, driver, gunner, 2 loaders
Weight 60 tons
Length vehicle 25'2, gun to front 30'6
Ht 10'6, width oa 12' over tracks 11'8
Ground clearance 20ins
195ins of track on ground
Armament 180mm + 2 .30" mg 12 rounds of 180mm
turret ring dia 115in elevation 15deg, deprn 5deg; traverse 90 degrees
Armour
turret front 10in basis
hull: glacis 10in, 6in at 55deg; nose 3in at 45deg; sides 2in skirt; floor 20mm + 16mm local mine protection. roof 1.25in
rear upper 3in, lower 1.5in
Max road speed 21.3mp; vert obstacle 3ft; max gradient 35degrees; trench 11ft; shallow fording 4' 9in
Fuel 300 gal
Engine RR Meteor Mk12 12cyl 800bhp at 2800rpm