No, unless the heads have been milled. I always use paper gaskets on both sides of the valley pan when using aluminum intakes. I've had several aluminum big block intakes leak so bad that they didn't want to run. The paper gaskets won't throw the holes off by much. I've never had a problem with lining up the bolt holes using them. If the bolt holes line up through the valley pan, they should line up through the paper.
Wonder what the deal is with aluminum leaking so bad without the gaskets? Are they just not machined as well as the chrysler originals or what? If thats the case, its a damn shame for the price you have to pay for them! Ok, do i need to use RTV along with the paper gaskets to be sure the dang thing will seal this time?
