Alright, the Duke in my 85 2m4 coupe is sitting right at 205K original miles, and I'm starting to think it's minor-overhaul time. It doesn't smoke at all, I've replaced most of the sensors, so now I'm leaning toward general mechanical stuff. I'm shying away from a new fiber camshaft gear set, and I can't find any parts stores (Advance, Pep Boys, or O'Reilleys) that can source the alloy or steel timing sets or individual gears.
It looks like I'm heading toward the Fierostore's alloy set, but I've come across a Cloyes steel "straight-cut" set for "Pontiac 151 race engines." I'm wondering if this would be a reliable set-up in lieu of the alloy set for a daily driver, if they're notably stronger than the alloy set, or if the only caveat might be a "whine" sometimes associated with the big 350 gear-drives.
Thanks in advance!

Most parts stores should give you the option of Steel / Alloy timing gear set.
Since the Fiero had the Fiber gear, that is what the parts books will show for a Fiero 2.5L . Try looking at the timing gear set for a 1964 Chevrolet Nova 2.5L.

I believe the Chevy 250 I-6 timing sets also fit the Iron Duke, though I'm not 100% sure.

I do know that the Cloyes catalog shows at least one timing set common between Pontiac 151 and Chevy 250.

I also know that they said just because its not listed as a fit doesn't mean necessarily that it won't work, it just means they've never validated the components for that application.

Good luck! I have a 8-1018 set (or something like that) which is a steel/alum helical cut set that I plan on using.

Kurt

I have two different manufacturers alloy gear set's. I will try to remember to post the part #'s tomorrow.

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Found it! Sealed Power set is 2522, alloy/steel set for a 64 Nova w/ 153. Thanks for the direction!

I've had both straight cut and normal metal timing sets in dukes, both whine like a noisy gear drive in a SBC.

metal duke timing gear from 72 nova 6 cylinder:
//www.fiero.nl/forum/Forum2/HTML/079733.html

There is also a strait cut set available in the rock auto website. Overkill for a stock rebuild IMO. The fibre gears last for a long time. I have had several duke engines with 250,000-400,00 km that still had decent gears on the timing set. Only one engine had a fibre tooth failure. It was in the 400,000 km range.

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His Fiero: 1984 2M4 Coupe

Her Fiero: 1984 2M4 Convertible

Primary reason for the fiber gear is noise reduction. If the engine is maintained properly and the oil changed regularly the fiber gear will last the life of the motor.

JazzMan

quote Originally posted by KurtAKX: I believe the Chevy 250 I-6 timing sets also fit the Iron Duke, though I'm not 100% sure. Kurt

Yes. That is correct. We did that on the first Fiero we owned. Steel to Steel timing gears. We also enlarged the oiling port for the gears, which helped some with the whine.

Ok sorry this has taken so long. Head was killing me over the weekend.

Cloyes 8-1016 or 923871

and

Dynagear 2525S