I am wanting to put a set of tube shocks on the rear of my 30 roadster,i have a pair of BRAND new ones for the front of my 51 f1.They would fit just right.But they are gas charged,and i think they will be too stiff for the 30.Can i relieve the gas from these some way.I thought about drilling a small hole in them around the top and either threading it so it can be pluged or welding it? ??? What do you think.