My son and I are replacing the old worn out 305 in our Blazer with a reconditioned 350 Marshall engine. We have pretty much ageed on everything as far as bolt on products are concerned (headers, guages shocks etc.) But we have run into a little snag as far as intake and carbs are concerned. We both belive that an Edelbrock performer intake with an Edelbrock 650cfm sitting on the top would be the right thing to do. But my son is a little short on cash. He has been talking about putting on a factory cast iron (pre emission) 2 barrel intake, with a stock gm 2 barrel. I am not sure whether that is a good idea or not. Is it possible to "under carburate" a 350? He is more concerned about it being economical that than a high performer. Will probably be the daily driver grocery getter. I am looking for some opinions on the subject. 2 barrel or 4 barrel? Any information would be greatly appreciated.