On the round tail cars like our GT6, the conversion involved a couple of very simple weldments to provide the lower anchor point. These picked up existing bolts so no frame/body mods were required. The top end attached to existing holes in the wheel arches. The wheel arch holes were enlarged from something like 1/4" to 5/16" to accept the gas spring studs and I used fender washers to spread the load out a bit.
To those about to make this for themselves I offer one caveat that I have not seen mentioned when this conversion is discussed. If there is any play or slop in the pivot bushings the bonnet attaches to, be prepared for the bonnet to be pushed "back" towards the rear of the car when it is down/closed. The backwards motion will close the gap between the back edge of the bonnet and the front edge of he doors. We lost paint on our bonnet and doors because of this. Re-adjusting the bonnet a bit forward corrected this on our car. Please learn from my mistake.
: Never seen one, I think you will need to
: engineer and build one yourself
: --Previous Message--
: Where can I purchase a hydraulic ram
: for the bonnet of a GT6 to replace the
: single prop rod