If you are using dual valve springs, then steel gears are the way to go.

Even though it costs me a guaranteed repeat job, I always suggest to my customers to upgrade to the steel timing gears set. Yes, the steel gears can be noisier, but the customer will never have to pay for another timing gear job. And even when the camshaft wears out, the steel gears can be reused.

I personally don't like the aluminum camshaft gear as we broke 1 on our race car a long time ago, but we were running dual valve springs.

And AFAIK, you can't get the aluminum cam gear by itself, it should come with a new crankshaft gear. FYI, the crankshaft gear that comes with the aluminum timing gear, doesn't come with pre-drilled holes for removing from the crankshaft.

It is possible to reuse the fiber gear. Just check to make sure the gear isn't worn by checking for excessive play and check that the metal hub is still firmly bonded to the outer fiber gear.

New aftermarket fiber gears are available and I usually have them in stock.

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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com