spdbrake...thanks for the links. I have found that the CC forum folks to be helpful.
Yep, I know IRS car suck for launches in 1/4 mile stuff.
I see the BackDraft Boys have solid mount for the subframe and the third member....
http://www.backdraftparts.com/produc...-bushings.html
Turner Motor sports has solid on the diff ears, delrin on the nose...
https://www.turnermotorsport.com/p-3...36-m3/?pdk=AgE I like that configuration.