Guys
I spent the afternoon mounting my P160 on the KingCat and noticed a couple of items that you may want to check. The supplied 4/40 bolts that are used to screw down the engine's aluminum mount onto the aluminum block were bottoming out before properly seating. I found all four to be about 1/16 too long. If you use the 2 #4 washers in the front mounting holes to give you more downthrust then the front screws will be fine but then check the rear ones.
The rest of this post has been edited due to my inability to follow BVs explicit instructions...sorry Bob!
Dean
www.helijet.ca