Had a Rover 3500S 4 speed sedan with the ex Buick 215cid V8 in the mid 70's - a model preferred by the British highway patrol. Replaced the 1.75" SU carbies with an Offenhauser inlet manifold and 465cfm Holley 4 barrel carby, which boosted HP sufficient to easily tow a ski boat. Found the Lucas dizzy often went out of tune, so fitted Lumenition ignition.
Apart from Rover cars, SU equipped 215cid engines were fitted to early Range Rovers. Later Range Rovers and Landrover Discoveries had the improved fuel injected version. There were some overheating problems, but in general the engine was reliable. Being of aluminium, engine rebuilds are better carried out by mechanics familiar with these units.
Prior to being sold to Rover, the Buick version of this lightweight V8 engine formed the basis of the Repco Brabham F1 world championship winning cars of 1966/67
Viv