i can tell you from personal exp. that the solid mount thing is going to get VERY old VERY fast. the buzz at idle is fine and high high rpm is fine its the sustained rpm for cruising that is horrible. had them in my rabbit to raise the motor in the bay so i could drive it without the pan being ripped off, it last 2 weeks and I hated driving it so much I redisigned and used a leaf shackle bushing to absorb some vibrations. This pretty much eliminated engine movement while making it not as bad to drive. My advice to you is make a second set of mounts with some sort of vibration dampening and try the ones youy got. if you are ONLY racing the car you prob wont car but if you drive it on the streets your ganna HATE the buzz, it ripps through the car light asonic boom. As always the parts look great and I hope you dont take my reply wrong,I’m just saying this becuase I’ve tried it, had solid mount in the supra too, didnt last, same problem 
was WAY to buzzy…and didnt really make much difference in drivability, actually made it kinda jumpy at low speeds.