6al BOX= $ 226
3 STEP RETARD= $226.00
rpm SWITCH FOR SHIFTER = $100
3 STEP REV LIMITER= $80
TOTAL $632
7AL-3 = $ 645
And with the 7AL-3 you get Four built-in timing retard modules plus the start retard...vs the 3 retard modules in the above example
Plus the 7AL-3 has more spark energy.