Some people have been asking how to remove and or plug up the air injection ports on '75 and '76 2.0 motors.

A few different methods can be done:

1)Welding of the holes, this is only practical if you know you will never need the air injection holes again. It is also only practical if you have the heads already removed from the motor.

2)Threading in a 10mm valve adjusting screw or allen head screw. I don't like this route since there is a good chance of the screw becoming loose down the road. (Jon Watts just had this happen not too long ago)

3)Using a bolt to plug the hole...this is shown in the first picture. The advantage of this route is that you can use the bolt to secure the sheetmetal to the motor and you can remove the bolt in the future if need be in case you must once again have the air injection ports fuctional.
I have had the bolts work themselves loose...so I made a little bracket which uses the intake stud to make sure it cannot come loose.

4)Keep the air injector in the head and plug the top of the injector.The last few pictures show this. I used a ball bearing to get a better seal, this acts just like the valves in the head to create a better seal. The cap is from the local hardware store...I believe it is for a 1/4" pipe
Like #3, this can be benificial in the future since it can be taken apart and easily put back into service.

(IMG:http://members.rennlist.com/mueller/air_injector_bolt.jpg)
(IMG:http://members.rennlist.com/mueller/cap_on_injector.jpg)
(IMG:http://members.rennlist.com/mueller/ball_in_tube.jpg)
(IMG:http://members.rennlist.com/mueller/exploded_view_injector_plug_parts.jpg)

I welcome other ideas so that we can expand the knowledge (IMG:style_emoticons/default/mueba.gif)

Disclaimer: Disconnecting smog equipment might be illegal in your area, check local and state laws first....... (IMG:style_emoticons/default/mueba.gif)