This is the proper tool. Requires removing the starter to install it, which isn't as big a deal as it sounds.Next question.... how do you hold the harmonic balancer still in order to torque the crankshaft? And 240 ft/lbs on the first pass? I'm gonna have to borrow a heavier duty torque wrench.
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But I went another way when I did mine. I used the ARP harmonic balancer bolt because 1/ it's reusable, and 2/ it can be torqued to final value without using an angle gauge. I gave it some good ugga duggas with my impact wrench and it hasn't moved a lick in 3 years.