1.6 rockers with stock 318 cam??

That Eddy torker is a hunk of junk IMO. Put a performer on it and it'll gain a bunch of torque. My Cuda had a torker on it when I bought it and I swapped on an Air-gap and it made a huge difference in low end torque. As for the 1.6 rockers, I agree with the others. I took the time when I was building my 408 to measure the effect of 1.6 rockers and saw a 3-4 degree at .050 gain and .033" lift gain. You'd gain a little switching to the RV cam but is your engine in real good condition? If it's not slapping in a bigger cam isn't a good idea.