Hi Rene ( xc68anc)
Here is the parts list from the video which does have the bolt lengths.
SHOPPING LIST
1. Fixed Top Lug - 4cm of 2.5cm x 1cm Aluminium Bar
2. Hood Stay - 11cm of 2cm or 2.5cm x 0.6cm Bar
3. Hood Stay Support - 1cm of 1.2cm diameter Aluminium Bar
4. New Top Lug Bolt - 1off M6 x 30mm Stainless Dome Head Screw Bolt + 1 M6 Stainless Washer
5. New Hood Stay Bolt - 1off M6 x 25mm Stainless Countersunk Screw Bolt + 1 M6 Stainless Washer + 1 M6 Nylon Washer
6. Stay Support - 1 x 25mm Stainless Cross Head Woodscrew + 1 x 1.2cm Polished Chrome Screw Head Cover.
7. ThreadLock to prevent the Hood Stay Bolt from loosening during operation.
Best Wishes
Frank