[Tech-ish] downpipe/cat replacement tool

[doubt at inwave.com (Nate Mellom)]

When I did my engine swap on my '84, I used an exhaust clamp set up 
backwards (take of the clampy part, thread on both nuts, re-install 
clampy part backwards), then put the exhaust clamp 'press' inside the DP 
hold-on clamps and cranked the nuts looser (down the threads).  Opened 
them up pretty well, but if I remember there wasn't much room to move 
the wrench so it took a while.  Used a Phillips screw driver to 
re-install. 
Better plan:
Upgrade to a 4-2-1 exhaust.  NO stupid clamps! And more power.