Funny you should say that, ive just rebuilt a 186 for a friend, cost us under 1g for completely fresh everything minus pistons and rods including a yellowterra head and chrome goodies, next is mounting the 1G Blower to it, should go quite well i think. We've been told it should make the same sort of power you mentioned and this entire conversion into my mates HR is costing less than 2g's includion the original purchase price of the engine, meybe we should all buy holdens??