I really like that pic when Matt Neal had all four wheels off the ground! The diff looks good. I have the spacer that fits between the gearbox and bellhousing if you find a Holinger. You can buy them new still, and occasionally they come for sale second hand. Mine came from an Opel Omega DTM. The ratios were slightly different, but it works good.
http://www.m3motorsport.co.nz/produc...gearbox-spacer
A friend of mine just sold an ex Vic Lee Holinger 6 speed recently
The ECU is not anything you will want to use again, I don't know what that one is?
Conrad