Great job on the form die for the exhaust tubes ! 
I did the same thing when I started to build the log intake for my old Caddy. I was building the whole manifold from Copper ( I had it available...$$$$). I used round copper tubing for the runners and had to form them reqtangle to match the intake ports.
I'm sure your set up will work fine, nice going !
"BH"

I did the same thing when I started to build the log intake for my old Caddy. I was building the whole manifold from Copper ( I had it available...$$$$). I used round copper tubing for the runners and had to form them reqtangle to match the intake ports.
I'm sure your set up will work fine, nice going !
