I install 2 Chinese made knock off Rochester Quadrajet carburators. Will they work or are they junk?

I install 2 Chinese made knock off Rochester Quadrajet carburators on my 1978 Nova and 1981 Silverado. Will they work or are they junk? Carburetor Carb For Quadrajet 4MV 4 Barrel compatible for Chevrolet Engines 327 350 427 454 https://www.maxpeedingrods.com/produc... Fans code(Clunkers) -10% on all MXR auto parts #maxpeedingrods Grepro Jump Starter: https://www.amazon.com/dp/B0CH9LFCZ4?...   / clunkers-and-classics-100883112077360     / clunkers_and_classics   clunkersandclassics@gmail.com You can support the channel by buying a bumper sticker for $5. You can pay to my email address clunkersandclassics@gmail.com through Paypal.com. If you would like to send parts or anything, you can send it here. Much appreciated: Clunkers and Classics PO Box 262 Mead, Oklahoma. 73449