Any way to tell 1.6 ratio Roller Rockers from 1.7

[R3_82GT]

I'm looking at cams for my 306 build and need to now how my rocker arm ratio will impact the lift. For some reason I was thinking I had 1.7 ratio roller rockers, but now I'm not sure since they came with the car and have no markings on them (they are just blue anodized aluminum). My guess is they are Ford Racing rockers, but my Ford Racing catalog shows they made 1.6 and 1.7 ratio. Any ideas?

[ktm300hater]

Well the pushrod is closer to the fulcrum on 1.7's. so find someone with some to compare

[Cooter]

Ford rockers will be marked accordingly.

Honestly, if they're just cheap chinese rockers w/ no markings? I'd say upgrade to a decent set

[Mach1]

Ford rockers will be marked accordingly.

Honestly, if they're just cheap chinese rockers w/ no markings? I'd say upgrade to a decent set

X2 I've seen some very bad thing happen with junk rockers