Not Ranked
I am using the Romac unit on my 428. Fits fine and I have an old Ford two-groove pulley bolted on it to drive my power steering/water pump and alternator/water pump. The full 360 degree timing marks are nice for setting the valves. I double checked the timing mark to the original tab screwed on to the timing cover and it was only off by 2 degrees - not bad! I got mine from Rob at Blue Oval Performance in Denver 303-762-8298. I think he stocks these.
Gary
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