Well, I must bow to the collectives superior knowledge.
Following some research I must say that I can only find 1 photo that shows the removable intake manifold on an A110, and that surprises me, as I know that I have read at least two articles where the Healey head had been adopted for the saloon cars, see extract of one source below.
The new A110 retained the same basic unit-construction chassis/monocoque as the original A99, but there was a 2-inch longer wheelbase (arranged by moving the back axle rearwards on its springs) which allowed modified wheelarches to be designed and more space to be provided in the back seats. Also at the rear was a newly-installed transverse shock absorber, between the axle casing and the bodyshell, to contain incipient axle sway due to all the rubber in the rear suspension linkage. After the first few months, power-assisted steering became optional.
The engine was significantly more powerful, with 120bhp, this being achieved by 'raiding' the experience gained with Austin-Healey 3000s and involving cylinder head changes, a different camshaft profile and a twin-bore exhaust system. For this
Ah well you live and learn
Bob