Oh..oh..desert flower beat me too it..
Somebody on chat a while back was talkin about his mate with a Leyland V8 inna RV-6.
Well of course it aint a LEYLAND its a bloody aloominum BUICK wot the poms pinched to shoehorn into various ROVER ****boxes.
You could use any of the yankee aloominum blocks turbo charged and they would run forever.
They had a 690 running as I recall with a Garret one side and a V8 on the tother.
Went like ***** offa chrome shovel but I think the lawyers killed it.
If someone invented a L**oming today and wanted to put it in a light aircraft they would get arrested.