OK back to work, cutting up a set of SBC upswept headers to use on my car 

One side

Right Side

Cliff, what is the purpose of what looks like a piece of 1/2" plumbing pipe in the collector area? It looks like it would have a tendency to draw air in to the exhaust stream, no? Great workmanship, thanks for sharing............

64F100 57FAIRLANE500

Hi, that's where the evac system I'm making will connect, it will create a vacuum in the crank case (from the valley pan) vacuum in the crank case= more power.

Looking good Cliff. What are your plans for the headers? Will they be ceramic coated?

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

Crankcase evacuation system needs an anti-backfire valve at the headers, or you could blow out your rear main seal or other gaskets.  I found the Moroso kit to be the best when I did a flow bench test of the pitot tubes and their positioning in the header collectors.  Joe-JDC 

JDC

I will use a 2 Ford gulp valves (60's smog valve), looks the same as a Moroso valve, yes they will be coated, with what I don't know, I may paint them for the time being, I'm also making extensions (about 15") that I can use to help tuning.

Joe I have always drilled 1/4 holes in the headers close to the flange (about 6 inches from the port) for air to enter and cause after burning (sorta of), but these will have wide band sensors in the collectors and gauges in the dash, do you think the the 1/4 holes in the tube will upset the sensors?

I would think so.  Also, you don't want the O2 sensors to be too close to the header exit.  There is reversion in the headers at part throttle in most instances that can affect the sensor's readings.  Joe-JDC

JDC

It would be nice so cut those evac tubes at a 45* angle. I’m surprised they were not prior to welding. They are great for a little hp they say.

56 Vic, B'Ville 200 MPH Club Member, So Cal.