I considering buying an Edlebrock Performer intake from a friend to put on when I install my new cam but I have a few worries. Will the intake hurt my gas mileage much? Will it give me enough extra power to be worth buying it and possibly hurting my mileage? And, I know its for a 350 but does that mean it will work on my truck for sure? Is there anything I should look for to make sure it will work on my truck?(Its a 73 K20). Also, I cant afford a new carburetor for a while, is there any way to bolt the stock quadrajet to the new intake? Im not so concerned with a performance gain at the moment, im just installing the intake while I have the old one off to put the cam in anyway. Someone told me I could get an adapter or something to put my carb on it? Also I was just wondering, how many CFM is my stock carburetor? I had planned on getting a 600 CFM carb after the cam and intake are installed and I find one for a good price. That would be a big enough wouldnt it? Like I said, im not too concerned with getting much more performance out of it, id much rather keep what gas mileage I get now. Finally, what carburetor brand should I look for. Ive had mixed results from asking people so far between Holley or Edelbrock.