Drop spindles for 64 C10 *Advise/help please*

[Tortuga_64]

I have a 64 C10 I've already done disc conversion with spindles from a 67-72. They have 1.25" rotors. With that being said I'm planning to order parts soon for winter project, I'm gonna order narrowed control arms from porterbuilt but need drop spindles I keep seeing them online for 63-70, 71-72 also what's the best brand? CPP? Belltech? I'm definitely wanting to go air ride and in the future I plan to buy drop member from porterbuilt to lay body but budget allows for a bit at a time.

Thanks for any help