Thanks Craig. Thought I'd post a follow-up with some additional comments in case anyone else could benefit down the road.
The sprockets are a
VERY tight press fit. I initially tried using the Craftsman 8" 2 jaw puller pictured below. Per the advice posted, I applied substantial pressure with the puller and began to apply heat with a propane torch. Nothing. I applied increasingly more pressure and heat expecting to hear the pop. Nothing. I finally tightened the puller to the point that it started to get out of shape and decided to stop. Although only a 2 jaw puller, the 8" Craftsman is a substantial tool and I thought it would be enough for the job. It wasn't.
I then borrowed a buddy's monster Armstrong 3 jaw puller with cage (sorry, no picture, I'll try to take one next time I'm over his house)....what a horse....it was a bit unwieldy, but the sprockets put up zero resistance to the massive Armstrong puller without applying any heat. They simply broke loose as I began to apply moderate pressure. For anyone attempting this job, I highly recommend borrowing or renting the largest puller you can find, it makes all the difference. Also, I made sure to protect the fine tooth splined shaft on the small end with a plastic cap and used a 5/8 deep socket as an anvil for the puller to push against, and I used a very hefty metal spacer to protect the surface on the blunt end so as not to damage any surfaces.
Mike
