LD85 wrote:
On my 85, the 2151 were Ok except for the #4 & #6 plugs, so I cut the header tubes off the flange and welded in new tubes that I bought from Summit, I used Hooker tube sections that they sell and routed the tube out farther away from the spark plug and blended the tubes back into the area that I had cut out and heli-arced them and had them recoated

Also, if you have a stick, the clutch salve will be very close to the collector