Why can you not just clip the plug off the old cap and install it on the new cap? Thats what I'll do when i get to it.
BTW this MC is from Low Range: TB-MC-HILUX Toyota V6 Master Cylinder, 1" Bore Pickup, Hilux $80.73
My lines were easily bent by hand to align to the new m/c.
Did you upgrade to a dual diaphragm brake booster as well?
on my 83...