Cloyes has a dual roller timing set on the Autozone site, at Hesco (
www.hesco.us) and at Summit racing. I looked at Carquest but couldn't find an on-line shopping catalog. Presumably if you go into any of them with this part number:
p/n 9-3172 = standard center to center distance
Only saw these on Autozone
p/n 9-3127-5 = .005 reduced center to center distance
p/n 9-3127-10 = .010 reduced c-t-c distance.
The crank gear on these 3 also has 3 keyways to adjust timing 2 deg. in each direction.
At Autozone all are $142.99.
One of these sites said you couldn't use the oil slinger because the chain is wider. Probably also have to watch for clearance of chain-to-block and chain-to-cover and maybe come up with a thicker gasket.
Kind of overkill, in my opinion, unless you are racing or need the distance adjustment. Regular chains with regular use last a long time.
standard cloyes chain set (didn't look roller) 9-3041 at $43.99
Hesco sells a single roller set for $129.
I'm sure someone with the right equipment could make a gear drive.
Anyone every try this place:
www.emachineshop.com
Use their drawing tool to design the gears & keeper mechanism and upload. They do the work (in Fla I think) to your spec & deliver.