390 double pumper vacuum

I see you have 4 air-leaks there; one hole drilled in each throttle blade, commonly done to introduce Bypass Air for a big-cammed engine, something around 300 degrees advertised or more.
That's a lotta lotta Bypass-air, and the engine under it probably did not have any PCV, lol, cuz the baseplate has no provision for it.
If you intend to use that carb on the street, you got some work to do;
1) You'll need to shut up those Bypass holes, and
2) You can't run a street engine without some form of Crankcase ventilation. Well you can but it won't take long to make an oil-leaker and/or oil burner out of it. and
3) You really need some kind of load-controlled timing advance to tame the engine, to maximize fuel-economy, and to provide Part throttle torque.
4) that carb needs a Powervalve

None of these are insurmountable; but Grant's Pass, Oregon is at 904 to 1951 feet, so how are you gonna handle elevation changes?
and, and, you got no choke, but worse is, the carb has no provision for it. Which means you are gonna have to practically pour the gas down the hole to get her started, and then keep pumping during the warm-up period and a good percentage of that gas is gonna end up going past the rings, and into the oil, prematurely wearing out the rings, the bearings, and the cam lobes, etc.
Personally, I wouldn't use that particular carb in Grant's Pass Oregon, in any stop-start/short-hop, street-type application.