My friend gave me a Quick Fuel 950 carb with E85 metering blocks. I am planning on running gas so I need to replace the blocks. I was looking at the QF replacements blocks but not sure which ones to get. Do I need the same block on the front and back? Any advice greatly appreciated. I have been looking at these:

https://www.summitracing.com/parts/qft-34-10qft/overview/

Thanks,

Steve