Excellent idea.
The rocker arm ratio for your engine was and is 1.6. Your rockers are stamped steel, and create quite a bit of friction. The rockers we have been referring to are Roller Rockers (RR's). They are designed differently, and haveat their center a roller needle bearing trunion, which virtually eliminates any friction. Most serious engine builders install roller rockers in their engines, and are usually the stock 1.6 ratio. The 1.7 roller rockers have the advantages of being roller (less friction), but because they are longer, they actually create a great deal of load on the valvetrain. Most consider them a poor mans camshaft upgrade, but even that is false, because the lift is the only thing that is really changed.
Take care,
-Chris
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