If you really want to blow the cash check out www.raretrick.com They have the most inexpensive engine assemblies(long blocks) I've seen built up by spoon.But as said above they are a waste of money unless your going to be doing endurance racing or something.
the Spoon Engine Block is made for endruance racing only. it would be point less for autoX. if u plsn on running any 24hour races. every weekend. then yes a spoon engine is the best. u can get without doing it your self. i have seem a few. dynos of spoon engine with type R IM and exhaust. i think it was somewhere around 207hp cant remember what the torque was. hope this helps.