[Michael C Henry]

I do not remember what the bind was .The dowl broke with the engine together.I blame the Hex-adjustable timing set. In a Ford cam appication ,there is only the one bolt holding the gear to camshaft.It had the dowl driven off the eccentric going though the slotted hole in the gear and into the camshaft.. The motion is from the clamping of the eccentric ,gear, and camshaft. I ended up with an ARP cam bolt , way more torque.
I used a solid carbide 5/32" bit,a Drill Doctor and four hours. till the bit was too short.Next morning I bought a carbide tipped bit in1/8" no twist .I had to experiment with the drill doctor a little .When the tip broke off that second bit then I went after it with a 1/8 moto-tool and a carbide rotary file (burr).I went throught he back of the dowl then started opening the hole and trying to divide the dowl into four peices .When I actually went through the side of the dowl ,I was able to collapse the dowl and remove it. All with the camshaft in the engine and engine in the car.