Head gasket replacement and beyond,,

[spongebob]

a coworker recommended a guy that can do it for $2800. less injectors..

[DmaxMaverick]

a coworker recommended a guy that can do it for $2800. less injectors..

Whoever does your longblock swap, regardless of cost, will (should) include the fuel system installation. The reman longblock you linked does not include the fuel system, nor would any other (not complete) reman. Considering that, the source of the fuel system, or system components, is irrelevant. The "injectors" will cost only the purchase of them, with the installation being already included in the engine swap (or absolutely should be). There should be no distinguishable difference to the installer, whether the injectors (and pressure lines) are old or new. However, having done many engines swaps myself, new parts are almost always more desirable over old/used/dirty parts.