1.6 rockers with stock 318 cam??

Bang for the buck wise, I'd say this would be pretty near the bottom of the list. You wouldn't gain much power, but would probably overwhelm the stock springs. Standard mods like a small runner dual plane and a good exhaust system will provide more.

If you still have the stock cam, does that mean you still have the stock cam sprocket and timing chain?!? (TIME BOMB) The plastic tipped sprockets were nice and quiet, but they get brittle in time. Unfortunately when they fail, the engine gets really quiet all at once.

For the cost of a set of quality 1.6 rockers, you could buy an XE262 cam, a used performer intake, perhaps a set of common 1 5/8" headers, and a new timing set.