I started having valve float about 2-3k miles after the 1.7RR install. I replaced them with a set of Comp springs from Jegs (~$65) and am now able to rev it all the way to the rev limiter
Dark_5.0, if I were you, I'd just install a set of 1.6's and a cam with a decent amount of lift (atleast .510"). The 1.7's are a good cheap upgrade, but 1.6s help keep good valvetrain geometry.