V8 torsion bars

I think you may find that those size bars (listed) may be too soft for a big block.
With 890's and a small block I had mushy problems with them.

I think you might be a lot happier with something over 1 inch, as I replaced mine with 1.03's from PST and it actually drivable without bottoming on dips in the road.

I had the 890's set pretty tight and still had bottoming problems with a small block.
Not to mention feeling like I was driving a boat on corners.