VERY IMPORTANT mod needed for S30 Z cars

[A to Z]

If you have a Z car, this is a required modification as soon as you want to put a larger front sway bar on the car. Reinforcement plates. Without these, the larger sway bar will literally pull itself out from the treads and cause major issues. No one told me, I managed to just see them, and once I looked in to it, I was shocked!

https://zcardepot.com/products/sway-bar-mount-reinforcement-plate-front-240z-260z-280z?variant=32170183262321&currency=USD&utm_source=google&utm_medium=cpc&utm_campaign=google%2Bshopping&gad_source=1&gad_campaignid=17820837536&gbraid=0AAAAADgHqXunKXwkRdKYJKxJH-WU_4VvI&gclid=CjwKCAjwruXBBhArEiwACBRtHZNWcNIiwbMvUrypRpviE3xNi1UuajMNdG7ffhovH9Z5NiwuNSG0IhoCQwYQAvD_BwE

[jhm]

Yep, that's a good mod.  You can also get them from Bad Dog, or fab your own from appropriately-sized angle steel.

 

https://www.baddogparts.com/store/product/1970-1978-240-260-280z-sway-bar-plates/

 

Additionally, I like to run the sway bar mounting bolts all the way through the frame rails.  If you go this route, you also need to insert round tubing through the frame rails (to prevent the bolts from crushing the frame rail) and backing plates on the topside of the frame rail (to spread the load, similar to what the reinforcement plates are doing on the bottomside).  This is a more involved modification, and not really needed for most street applications.