Help on 340 combo

The longer front spring hangers are not required on A body cars using SS springs. B/E cars yes. A's no.

That rear hanger angle Tom mentions is CRITICAL to making the spring work properly. Where it goes through the spring eye needs to be behind the upper mount location. If you are using SS springs, the mopar suspension book is handy.

There's a TON of time in the front end. Rise and friction reduction is real important there.

You need to buzz that engine, it's just getting to the meat of the powerband at 6K.