Hey I was wondering if anyone knows where to pick up a set at? Im looking to get a used set for now. How much more do they flow than lt1 heads? What type of Head gaskets should I get?

 

You will just have to search around. Every once in a while, you will see them for sale but Summit Racing sells them new individually. You might also want to just check into getting some stock cast heads ported by someone like Llyod Elliot or Adnvanced induction. They do some pretty impressive things with the stock heads. You might be able to get a little bit more flow out of the GM LT4 compared to the GM LT1 but I wouldn't think that it would be a huge difference.