9/16" tie rods, Fast Ratio arms, etc...

The 11/16” tie rod sleeves were a great upgrade before the tubular aftermarket sleeves came out. The split style stock sleeve is weaker because of the split, eliminate that and you don’t need to increase the threaded diameter. Plus the larger 11/16” tie rod ends reduce rim to tie rod end clearance if you’ve gone to wide front tires.

The fast ratio pitman arms are lousy for header clearance as it is. B/E bodies have a couple options but for the A-bodies there’s almost nothing. I can’t imagine that going to anything longer than that would clear any of the available headers.

Firm feel has a list of headers that do fit, for A bodies it’s really short

Firmfeel Mopar Suspension and Steering