few questions about 302 5.0 installation

[csunracer]

Thanks for all the helpful information guys. After reading the past posts, I have decided to use the stock water pump off of the 68 setup. So If i understand it correctly I should use a 50oz harmonic balancer if I am going to use the late model 5.0 block along with the early model flywheel and the original C4 trans. Another thing I'm wondering if any of you have used GT40-P heads on your classic stangs. I understand the sparkplug placement is a little different on these heads and requires special headers for this application. What I'm looking for is a good set of long tube headers, and an H-pipe to match. If I could find an h-pipe that would simply bolt in to a set of aftermarket long tubes that would make things a lot easier for me.