You have to expect stuff like this with cheap parts. You can build an entire car with Ebay parts. As long as you know you'll have to rebuild it again in a few years.
Just get the vs racing turbos man. You can get both for under $1200. Not the best turbo but will last longer than the eBay ones. No need to create more work for yourself! 66/73 or 67/66. I think you’ve got the 72/65. I’d call vs racing and tell them about your build and what they recommend. Good luck
