Yamajee, make sure you visit the CMC/Streetbeasts forum on the right side of the home page. Lot's of intel with that forum.
The Streetbeasts roll bar if done correctly is a mirror image to the original, same height width. The resto you are working on may have been done to the owners specs. My roll bar is welded to the frame, albeit I don't have the third leg and I have dual roll bars.
If your door handles are like mine in the photo, Don B is correct they are not from a Chevette, but rather an MGB. Mine are metal and I like them,
Here's a pair on ebay, of course you won't use the external handle
$40
https://www.ebay.com/i/172941384835?chn=ps&dispctrl=1
Yamajee where did you buy your car?