My torsion bar never worked on my car so i recently set about to convert the hood to gas struts.
I ordered 20" extended 30lb struts off amazon (12" closed) and 10mm ball studs
The top and bottom brackets are made out of 1 inch thick wall aluminum L bar.
The bottom bracket is a 7 inch piece of L bar with an M8 hole to attach to the old mount and another M8 hole for the 10mm ball mount to attach. The Ball mount should be drilled towards the top so the strut can clear underneath as it rotates.
The L bar was also bent slightly to push the ball stud 10mm closer to the engine bay and bolted in and stuck down with 3m tape.
The top bracket is a straight piece of L beam 12 inches long. I used the end cap off the old torsion bar as a template to draw in my dill holes. The drill holes are situated to make the bracket angle backwards about an inch towards the hood. This raises the shock off the fender when closing the hood. The 10mm ball stud is just drilled in on the end.
I added a 3/4 inch square cross brace to the hood to give the hood rigidity when opening and closing or else the hood tends to webble wooble when being opened or closed. The bar is 54 1/4 inches long and cut exactly to length the fit between the brackets. It is then bolted in place with a M8 bolt and nut and really makes a good difference opening and closing the hood. Be careful, the cross bar just clears the fender by 1mm so your hood clearances need to be spot on or the cross bar could hit the fender.