Yes, you should be able to bolt them right up. However, don't expect to see maximum power gains with the stock headers. When you pull the cylinder heads, you have to un-bolt the headers anyways, so that would be the time to do a header swap. Are the p&p heads your installing your stock heads, which you sent in and had rebuilt, or are you using a set of other heads that have been built to the Fox lake Stage 2 specifications ? If you've still got your stock heads on, I'de just hold off on swapping heads until you get a set of headers. Thats just my opinion. Another thing to remember is you're going to need a dyno tune after the head swap to get your a/f ratio correct, so remember that.
thanks dark knight, i am getting the p&p heads already to install from foxlake with custom cams. im having them and 3.73, axles and eaton posi all installed at the same time.....i am then having it dyno tuned with diablo chip.