1-1/8 & 1-1/4 front sway bar vs factory 7/8?

Just checked its a 7/8 bar, man that thing is tiny

Picture is old but thats my setup
View attachment 1715210225

The Hellwig #5906 will use the factory sway bar tabs. It's a 1 1/8" bar. I don't run that particular model, but I run the one they have for the 73-76's cars and it's a nice piece.

1971 DODGE DART Hellwig Anti-Sway Bars 5906

Looks like you've got brand new tires on there so it won't be an issue, but the sway bars that use the factory 67-72 tabs do limit your front tire width. Usually gets to be a problem if you go past a 235. But that typically means a 17" or larger rim too. No issues if you're going to run the 205/65/15's in your picture.