"Boat anchor" would probably be a good description if it's the truck motor...
They were also used in the A125 Sheerline and big Princess models of the late forties and early fifties, they would have put an enormous load on that Healey front end.
It was, in fact, the six from which the Healey four was derived. Built on a pre-war truck engine which started out, IIRC, at 3500cc.
Rex Law used one briefly in his Regal...
...but replaced it with a Cadillac V8. His was 3500cc from a military ambulance.