Welcome to the "joys" of owning a "component car", Ziggy.
Running across issues that you had no idea would arise will be a common experience as you proceed on this build...wait until you start on the electrical system
...oh, and people have probably forgotten to mention...the fun continues even after you have the car on the road...forget about being able to go to the parts store and get almost ANY part unless you know the specific year, make and model of car the damaged part is from...and all the specifics such as engine size, AT/MT, etc. It can make shopping for ball joints and that sort of thing a very frustrating experience.
But....and we'll all tell you this....it's part of the existential experience that defines owning one of these "detuned" race cars and attempting to use it for everyday purposes. Most of us wouldn't give it up for love nor money...well, maybe for enough money...but only enough money to start on the next project
Cheers!
Dugly