[94eg!]

Here's my observations from your photos...

Using back of block
- More outside wheel angle at full lock (bottom pic left side)
- similar inside wheel angle at full lock (top pic left side)

Using front of block
- Less outside wheel angle at full lock (top pic right side)
- similar inside wheel angle at full lock (bottom pic right side)

Conclusion: Mounting to the back of the block results in a reduction of ackerman at full lock due to the very obvious increase in steering angle of the outside wheel. The straighter link on the outside turns that one wheel more. This is how ackerman adjustment works on RC bell-crank steering.