396BB starter amp draw

[GMC69]

I'm curious to find out what the average current draw of a starter is supposed to be on a 396BB.

Reason I ask is that I have, on occasion had problems starting it. Sounds like a dead battery, but all power dies. I have load tested the battery and all is good ( I have a load tester from work). One thing I tried today was to remove a disconnect switch the P.O. had installed. I read the switch and it has a rating of 20amps continuous and 125 amp intermittent.

I removed the switch from the circuit and will try testing once it sits again. It is starting fine now that it is removed, but the problem was intermittent.

I tried searching but can't really find much on it.