go with 1.7's unless you plan on ever getting a cam for it.
They are good with a stock cam, or a mild one like the B303 I have. But they do cause more stress on the valvetrain.
Most cam companies tell you the lift with 1.6 rockers and thats what they are originally designed for.
If I had to do it over again, I'd get 1.6's and just go a little more aggressive on the cam.
hope this helps,
-Drew
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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