Andrew Stukins was Swineshead Institute’s penalty hero as the Tutes booked their place in the final of the Fishtoft Cup.
The keeper saves three Wyberton efforts as his side progressed 3-1 after spot kicks.
Due to the weather creating a backlog in Boston Saturday League fixtures, both teams agreed the contest would double up as a Taylors Garages Premier Division match.
And Swineshead also became the first team to take a point from the league leaders after the contest finished 1-1 after 90 minutes.
Chris Wing had hit the normal-time goal for Swineshead while Jordan Dixon grabbed the Wyberton reply.
Swineshead’s cool heads from 12 yards were Callum Simmons, Rob Masters and James Zealand.
The Tutes now host Ruston Sports on Saturday, where a place in the Lincolnshire Junior Cup awaits the winners.
In the Premier Division, Old Doningtonians drew 3-3 with Pointon thanks to goals from Danny Goodacre (two) and Ollie Gedney.
Mareham United won 3-2 at Old Leake.
Adam Lester and Antony Slater put the hosts 2-0 up at half time, but three goals from the away side completed the turnaround.
Only one fixture survived the weather in the Taylors Peugeot Division One, and that saw Coningsby comfortably beating Rippingale and Folkingham.
Tom Sewell, Sam Brader and Mark Wheatley were all on target in a 3-0 home win.
The big surprise in the Taylors Ford Division two came at Mareham Reserves where promotion hopefuls Friskney appeared to be suffering from the jitters once again.
Lee Wilson, Daniel Bodily and Craig Newstead netted in a 3-2 victory which saw Mareham lift themselves off the foot of the table.
Lee Bradley and Ross Clow replied for Friskney.
Swineshead Reserves moved into third position in Division Two following a 3-0 home win against Holbeach Bank.
Guy Mentle struck twice for Swineshead while Dan Thompson was also on target.
In the Taylors Vauxhall Division Three, Boston College look to have virtually sealed promotion following another thumping victory.
They had a convincing 5-0 away win at Rippingale & Folkingham Reserves with James Wright (two), Troy Randles, Jamie Dawson and Cameron Holland on target.
Promotion rivals AFC Tetford were unfortunate to have travelled to Benington Reserves in a week where their opponents’ first team were without a fixture.
Benington won 5-4 thanks to Gavin Bell, Lewis Mundt, Tom Baxter and two Tetford own goals.