I have not taken one off a 74 specifically but every one I have done required a Gear Puller. The puller will bolt to the Harmonic Balancer and the center bolt sets on the head of the Crank Shaft bolt. As you turn the center bolt in it will pull the balancer off.
You'll need to pull the big nut in the middle, then use a wheel puller or balancer puller.
there is a speacel tool called a harmonic balancer puller, you can pick one up at your local carquest.
I'd have to hire a mechanic
in the front on side of the harmonic balancer
You need a pulley puller.
Counterclockwise
Works best with a air impact tool. There is room.
Pull the belts, remove the center retaining bolt then use a harmonic balancer puller to remove the pulley. Make sure you use a disk that will protect the threads of the cranshaft when you tighten the puller.
First remove the old one using a puller that you screw into the harmonic balancer there is a key on it so you can not put the new one on wrong just use the bolt that holds the main pully on to push the balancer on
on the harmonic balancer, at crank shaft
check harmonic balancer. check harmonic balancer.
6cyl is 125nm
After removing the bolt, use a large gear puller. Tighten the puller, tap the head with a hammer, then tighten again. After a few repetitions the balancer will break free.
75 lbs 75 lbs
on the timing cover above the harmonic balancer leon