ended up getting a header from dennis welch in england...525.00 delivered...what a deal..could only find used manifold in usa for 300.00...anyway after cracking the intake while tightening the last bolt...what a drag, but aluminum is easily welded...everything is AOK and so very quiet w/ the monza exhaust out the back...much more power too...now i'm trying to get rid of the little backfire i can here now