Line block masonry alignment system for use in conjunction with door bucks and a plumb line

A line block masonry alignment system comprising, in combination:

• at least two rigid plastic and generally U-shaped line blocks having squared-off corners, each line block formed of a short leg, a long leg, and a cross-leg therebetween and with the line block defining a holding space for receiving a door buck, each leg having a central axis and a generally rectangular cross-section, the long leg having a length of at least 60% greater than that of the short leg, the cross leg having a length equal to that of the long leg, the cross leg further having a longitudinal groove formed along its peripheral central extent at a location remote from the holding space and with the groove projected through both the long leg and short leg, the short leg having an axial circular bore formed therethrough with the bore in communication with the groove and with the diameter of the bore being equal to the depth of the groove, the groove and bore of each line block adapted to hold and retain an end of a line therein;
• and
• a line having a knot formed at each end and with the line disposed within the groove of each line block and each knot thereof positionable within the bore of each line block, the line extendable in a taut configuration and thereby defining a plumb line for facilitating the level construction of a course of masonry when the line blocks are secured between a pair of spaced door bucks.