Matt, getting back to your question, the only way to know for sure is to test the clearance with clay. Also, find out what adding more lift will do to your performance before getting the 1.6's. If anything, I would only run the higher ratio rockers on the exhaust side only to even out the I/E flow ratio. Bigger is not always better, and in your case I'll refer to my first post: Keep it simple.
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'81 Sport Coupe 229 V6 -Junked
'93 Z28 LT1 - Parting out
"Is that a rat? No, it's just a really fat mouse."
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