Torsion bar help 1970 dodge dart.

Took my car back to the shop. They said they'll try but there might not be enough clearance for they LCA.

There’s a really good chance that shop has no idea what they’re doing. Make sure they confirm they installed them on the correct sides first, the new PST bars are marked left and right because they have a 20* index.

Second, it should be easier to install them the way they need to be. LCA’s should be roughly parallel to the ground at time of install for those bars. Not all the way down like described in the factory manual. If it comes down to it, lift the LCA’s higher to install the bars. Worst case then is you’ll need to run the adjusters all the way in to get it up to ride height. But really there should only be two possible installation possibilities, one of two hex flats. You want them to use the flat that places the LCA higher during installation.

***edit***

And I assume you know that you need an alignment after all of this, because you do.