You need too research the T-slot to understand what it does. Lots of good info on the web.
As for fuel system factory style tank, 3/8 line to a good mechanical pump for a street car, -6 from pump to carb. simple.
I looked up the t-slot, that’s the little opening where the throttle blades are. A long time ago I had it adjusted properly and I’d say it’s probably not adjusted correct anymore
Drove the girls to get donuts. Fires up first crank when cold, at the donut store it seems starved for gas. Crank it a bunch give it lots of gas before it fires up.