No a friend of mine had it made .There is no alignment tool needed because when you bolt the block - trans assemble in , the front can only go in one place

Joke of the day!

Oh yea duh, forgot about the Transimsion. To many IPA's. I am done posting tonight.

We did the same thing. I think I still have the CAD of the hole pattern and shape of the extension box if anyone wants to make one. Once the holes were started with a smaller drill bit, we used a drill bushing welded onto a plate and used a locating pin to ensure each hole goes thru the transom exactly square. With the size of the studs Rik uses (5/8" diameter and 10 holes), its pretty important to be on the money inside the transom vs being the guy that needs to rat out the holes inside the boat.

What is the height required or the X dim. for the unit?

This one!
https://www.youtube.com/watch?v=Ff9Iv5MUO50

When you said they did not perform well , someone took the arneson's off put on a different type of drive and they worked better ?

The X dim. is set when you mount the lower point of the boxes 1/2 in above the bottom of the running surface of the hull in line of the of the boxes

No, they did a comparison w/ it somewhere against a 42 w/ merc 700/6's. The Merc boat was faster.

Probably due to the na ilmor not making the torque of a supercharged v8!