B16 Cam Gear to Cam Bolt Size.
 

Hi,
I just bought some B16 Cams off of HT w/0 cam gears. I had some Cam gears from my ls head lying around and they're both stamped PR3 and they fit on my cams so i'm assuming they're the same. anyway, the bolt that holds them on the ls cams is alot smaller in diameter than the b16 cams. Does anyone know the size of the bolt I need to bolt them to the b16 cams? Any help is appreciated!