im on cossie managment and although people are saying its old, it doesnt matter you can get a brand new loom made by ryan (think thats what hes called) as youve said money is no object, anyone will tune it who can specialise in cossies and jano is a top bloke and will give you as much help and info about converting and can supply all parts ready!
i was going to do EFI conversion but you dont get much gain and its harder to map, so i was lead to believe and i never even looked at megasquirt seen people on here having issues with it though so i stayed well clear.