Front end rebuild kit with 73 and Up stuff!

I've actually have a sway bar that i took off of a 65 convertable years ago, but I still need the tabs on the lower control arms. Can I just weld a set on or do I need to swap lower control arms? As for the front end kit, It looks like I just need to order the appropriate kit for my car and see if they will substitute the upper ball joints for the newer ones. :thumblef:

Thanks