Straight holes can be reamed with a 7° reamer.
http://www.speedwaymotors.com/Speedway-Tapered-Ball-Joint-Reamer-7-Degree,2918.html?sku=91089411&utm_medium=CSE&utm_source=CSEGoogle&utm_campaign=CSEGOOGLE&catargetid=530009170000137591&cadevice=c&gclid=COy0taHDk8YCFYaQHwod7IsAwg

I have no problem with cutting a drag link and welding a sleeve over it. We used to install Air-O-Matic steering on our trucks.

http://www.maradyne.com/product-line/air-o-matic

It is installed by cutting the drag link and welding in a sensor.