most aftermarket carbs are JUNK
there very hit and miss at best,
so, IF it was possible, get your old carb and do a rebuild to it and make sure all is good and clean
and reinstall that
NEXT< the name of the game in fuel issues is start at the source and go down stream
a fuel tank sitting almost empty for a LONG time can get dirty inside
SO< this tends to mean, DRAIN and MAKE sure tank is clean inside(and fuel cap vent is working correctly)
then, make sure peacock is clean and flowing GOOD< as YES a slow flowing peacock will NOT keep up with fuel demands needed to run well!
NEXT is fuel line, after sitting so long, and if any ethanol fuel was used, it can have build up inside that can flake off and cause carb issues, so since fuel line is cheap, REPLACE IT from tank to carb
NOW as for fuel filters, many run them and NO isssue's(if installed correctly there is direction they have to be installed with)
SOME Folks have had issues after installing them and NOT getting enough fuel flow to run well, so, this is a personal thing, and they can always be removed if needed!
NOW clean tank, good working peacock, and new fuel line
NOW is the time to clean carb, if you clean before doing the above, you can be wasting your time!
SO< once you clean carb and I DON"T mean just spraying parts with carb cleaner!
but actually making sure all passages are clean and free flowing, NO build up on any parts and float adjusted correctly!
you should NOT have any more fuel related issues!
BUT That doesn't mean all is perfect
you still need to have to make sure other hings are good too
a GOOD clean oiled air filter, a GOOD spark plug
and GOOD compression on motor
a MOTOR that has sat a LONG time, can have rights that freeze up and lower compression and NOT allow to start
rust in cylinders can happen too!
, so, if after your whole fuel system and air system is good and you have GOOD clean spark and it doesn't YET run, time to check compression
get there and tell us what happens first LOL
but the above should solve all your issue's
skip steps and well,
might get lucky , then again, might just waste your time and have to repeat things a few times!