Other than a different throttle bracket, is the throttle cable different from a 2-4 bbl. Tranny is a th-350. I did this swap on my '72 cutlass and used a quadra-jet with no problem should it be as easy using a edelbrock(weber) 4bbl on a '70 vista...

 

Yes, the cable is different. You can buy one on the web used cheap or buy a new one for about 25 bucks. I changed my 2bbl to 4bbl. Other than the intake, carb, gaskets and throttle cable it was pretty much no problem. Don't forget that the 2bbl air cleaner also won't fit the Qjet. Need one designed for 4bbl.