So, what's the current draw of a "Ford style solenoid"?
A Ford 4 pin solenoid can be used. I actually use a Cole-Hersee solenoid, this is a heavy-duty, all metal can unit designed for intermittent use. Wires just like the cheap plastic auto parts store Ford style unit. Has the 4th pin for grounding. Use a jumper on the starter and this solenoid carries the load of both the starter mounted solenoid and the starter motor. Main cable at the starter is only hot in "start".
Current to engage this solenoid is just shy of 2.5A.
