Hey all, I am looking for the best options for 4 point roll bars in the United States. I have searched and found a few options like this https://www.thezstore.com/page/TZS/PROD/classic08j15/50-1924

or 

https://www.evasivemotorsports.com/store/product/autopower-street-roll-bar-datsun-z-70-83/

or kits like 

https://www.jegs.com/i/Jegster/550/942703K/10002/-1?gclid=CjwKCAjw1rnqBRAAEiwAr29II-fDTrPgRlqwbrRMi3HRYUqP4_CgwWC0rp-m6XlK1GD3yV2G5EVwMBoCTGgQAvD_BwE

This one looks great, but is in Australia

http://www.agi-precision.com.au/product-category/roll-cages/cams-roll-cages/bolt-in/datsun-bolt-in/datsun-240z/

I was wondering what you all think of your roll bars, has anybody used one of these? I was hoping to tie it to the floor and the shock towers to add a bit of rigidity and worrying that I might need to go custom but thought I would ask before I do. I would like the car to be streetable without a helmet, but would like the added safety for when I am on the track. I would also like as little interference with getting in and out of the car. Any other good options?

 My original roll bar had flanges that bolted to the shock tower tops and another set that bolted to the front of the fender wells. I had to drill those holes. I wish I remember the manufacturer but that was 45 years ago.