55.2-59 Outer Tie Rod ends to use on Camaro Spindles-Drill Out or Ball Joint

[MALIBLOC]

So a simple upgrade has , well turned into alot of cursing and walking away from the project . To start I thought I could reverse the castle nut and tap on the head of the lower ball joints and let s just say alot of filing and grind down the head of the ball joints I MAY have saved me some headaches, finger crossed, 2nd I couldn't for the life of me find castle nuts at 9/16-18 but would some nut at hilco and will use them till the castle nuts I order from amazon come in.
Regardless today was a ***** of a day and im going to bed.
Quick question
For the outer tie rod ends Im using a drop spindle from a 70-78 camaro and the steering knuckle is a taper hole for a ball joint with the current set up I have it was just a heim joint with a threaded bolt, is it ok to drill out the knuckle to accommodate my situation OR should I source a female outer tie rod and go that direction , the past camaro spindles were drilled out , just wasn't sure if the ball joint style is technically better, or is it the same **** either way. Wasn't sure if one is noiser or creates a knock versus the other.