I would try it since you have it..i assume your heads are stock cast ( no port work) same for intake......
what kind of dominater do you have ?..reason i ask ..is that i have a 1050 braswell dominter that actually flows close to 1300 cfm..
but all that aside..just try what you have ..it would be a huge waste of money to go out and buy another carb before you even try what you have...
i think you are ginna be just fine..particulary if its an off the shelf Holley dominater with no trick work..
PS: I know everyman has his budget and i AM NOT trying to go there..but if you would revisited the idea on those heads and look at some aluminum Dart 320's...for the money difference i think you would be much more satisfied...almost 80/85 lb weight differnce in these heads ALONE...and thats off your nose....so think about the difference here all the way around on the head issue..all the rest i like.
IMO
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "