just finished making my own intake and exhaust for my hemi 6.main thing to remember is to bolt down solidly before and when welding(and don't unbolt till cool!!)we unbolted the intake (from an old cyl head)too early and ended up with a 4mm warp(nothing a bit of machining can't fix!)you can view them on(just scroll down to steves manifolds)
http://members.optusnet.com.au/~c_s_rod_and_custom/gallery.html steve
