If you read the add for this 120 HP engine it states that 
"The increased HP figures are estimated, as we have not yet tested the output of these engines"
I cant beleive they have the nerve to put estimated horse power on there web site. I have spent alot of time on making vanagon engines with more power and hundreds of dollars on dyno testing and at this point I have never posted any rezults becase the numbers have been to inconsistant to stand behind.
plan and simple I dont like bull shit and bull shiters
If you want to make an engine make more power make it breath better. I also dont think welding WBX crankshafts to increase stroke is a good idea ever  
I invite anybody that is thinking of a upgraded vanagon engine to come and test drive my personal van with the big valve engine and the European Didjet ECU 

going faster miles an hour
I remain
Boston Bob
http://www.bostonengine.com