If you do the appropriate bowl work with the larger valves it should pickup flow, I have no before or after but most of us clean up the ports and open up the throats accordingly when you go bigger valves, I did that on some 2.10/1.65 valves for C1AE's in my 63 Fairlane 390 with mild cam 237/247at .050 with 559/579 lift Lunati solid lifter and 3x2's (not the best intake) run a nice 12.50 at 108 good air and 12.78's hot and humid at Kilkare now called Dorona Xenia in Ohio and real driveable on the street

Cheap wires or you don't have them plugged all the way on to the spark plug, spark finds the easiest way to go

How do you make that crank stroke fit ? Nice power !!

do you have any pictures with the cover off ?   Liberty does a process now that's called Face Plating but what you have sounds like the older style that uses Liberty's own modified synchronizers and matching gears

Sweet !! The Gonkulator was pretty accurate, is Werby still around ?

I use this with a new style tube and works great
https://www.jegs.com/i/Holley/510/26-115/10002/-1

thrust bearing just requires more steps and doesn't really help the bottom end like 2-4 does , my own DT2 390 block is cross bolted with Pro Gram caps