Best carb and linkage set up?

[tintoptexan]

Finally got the engine back in the 49. Have an offenhauser 4bbl intake with a 390 cfm holley adapted to it. having issues with the holley, and am thinking of running a 500 cfm edelbrock. right now the holley is on backwards because the stock linkage will pull on the passenger side. would like to hear what type of cable linkage would be best with the edelbrock, and will the edelbrock bolt up to a wcfb square bore pattern? Thanks for any advice to fet this thing running smoothe. Joe