Holley vs. Eddy 273

I played with the eddies for some time, and have now gone back to Holleys. From the 600 eddy to the 670 holley on my 318. Runs better. The 600 was just not enough. Eddys are way easer to tune from what I have seen, but the holleys have way more tune ability. I would think 570 would be great for a 273. Just remember any new carb these days seems way to lean from the factory. I had to go up 6 jet sizes on my 670. But boy dose it work great now!