Glen Taylor and Danny Elliott had traded second half penalties as the match was seemingly heading for an opening day stalemate.
However, Scott McLean broke through for the Moors in the 88th minute and finished with aplomb to spark jubilant scenes from the 104-strong travelling contingent, within the bumper overall crowd of 1,852.
FULL REPORT TO FOLLOW...
Boston (4-4-2): Peter Crook; Keenan Ferguson, Luke Shiels, Scott Garner, Matt Tootle; Fraser Preston (Jake Wright Jnr 76), Tom Platt, Andi Thanoj (Paul Green 67), Joe Leesley; Jordan Burrow (Jordan Preston 67), Danny Elliott. Subs (not used): Connor Dimaio, Terry Hawkridge.
Spennymoor (3-5-2): Dale Eve; Joe Tait, James Curtis, Carl Magnay (Ryan Hall 46); John Lufudu, Adriano Moke, Jamie Chandler, Brad Abbott, Scott McLean; Glen Taylor, Rob Ramshaw. Subs (not used): Stephen Thompson, Mark Anderson, Frank Mulhern, Harry Flatters (gk).
Referee: Matthew Scholes.
Attendance: 1,852 (104 visitors).
PIC: Russell Dossett.