hotchkis tubular upper control arm ball joint too big?

Nope. all of their TVS's come with Large Upper Ball Joints as they assume you've already swapped them over (generally more handling based cars use larger ball joints for disc brakes). However, if you really wanted to, you could request a small ball joint arm. They're usually good with customer service. Give them a call and see if they'll exchange it to you.

This is what you need...
http://www.hotchkis.net/product/geo...-small-balljoints/?mk=40&yr=1967&md=300&sm=39