Im in the Process of swapping cams in my 71 Olds 350. Engine has maybe 10K on it since rebuild, so its not a tired old thing. So the Balancer has n=4 threaded holes 90 degrees apart and Pullers are generally N=3 slots 120 degrees apart. Is there a special puller out there to use? Thanks for entertaining this dumb question in advance!

 

The puller i have has 4 slots i use the two right across from each other.

 

The puller shown in the Oldsmobile Chassis Service manual (J-8614-1) has two holes 180 degrees apart. Pulling with only two holes is usually sufficient.

 

 

I just use a regular steering wheel/pulley puller. They all have four arms - a Y with a middle branch. So you just use two bolts directly across from each other. No need to use all 4. It's an interference fit, but it's not *that* tight. The generic rental tool at the parts store will work just fine, too. No need for a special balancer puller.