I have done it on my westy.
Results - well . . . had 120bhp and a 1.6 16v engine . . . .
Costs - I paid around £500 all in for mine, bought the engine, replaced a load of things, cambelt, waterpump, idler,tensioner,crankshaft seals, plugs, oil, oil filter . . . . . then fitted it myself + then insurance was ontop of that