I'd stick with the 1.6 rockers. If you want more lift, then you can always cam up.
Most aftermarket cams are designed for use with 1.6 rockers. 1.6 rockers appear to be the standard.
1.7 rockers were more for improving stock cam performance (or for use with the b-cam or Cobra cam). And as you know, P/V clearance could be more of an issue with the 1.7 rockers.
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Russ L
'91 LX - 331 w/ Procharger
'03 Cobra Convertible - Pullied
'94 Lightning
'65 Mustang Coupe
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