16 Hole pattern for CJ Exhaust

[jimeast]

I have a set of C6AE-R heads with eight exhaust flange bolts.  I would like to drill for a 16 bolt CJ exhaust pattern.  Does anyone have a drawing or a sketch showing the bolt hole pattern with dimensions? 

[Phil Brown]

Don't have the hole layout handy. But watch the depth when you drill and tap the lower holes, might find water down there :-)

[Joe-JDC]

Take your CJ exhaust manifolds and lay them on the head, and install any bolts that fit, then take a center punch and centerpunch the other holes.  Drill and tap from your centerpunch location.  You will need a real center punch, not an awl to get the holes perfectly centered with the manifolds.  Joe-JDC

[Dryhoze1]

Use a transfer punch in the method stated above.

[427Fastback]

The last 2 replies are exactly how I do it....Manifold for the template and transfer punches for the hole location....