Any emission test tips or tricks?, I'll be testing soon... Options

[914zim]

Dudes:

I live in southeastern WI and I need to get an emission test before I can get collectors plates on my '76 914.
Once I get the plates, I will not be required to get tested anymore.

Do you guys have any tricks or recommendations on how I might help it pass?
I've replaced the plugs, air filter, fuel filter, injectors, resealed the tank (fresh gas) and installed a used cat, but I'm missing the air pump. I think my '76 came with an airpump installed from the factory, but a PO must have removed it (and the cat). I've also installed a good used (ansa?) muffler into which I've installed the used cat.

Once (if) I pass, I'll remove the cat and put the bypass pipe back in.

Any good tips? (besides lising it as residing in another county where testing is not required)?
Thanks for any ideas that might help.
Andy...

[john rogers]

Try to find a shop that knows 914s and can do a pre test so you'll know what you have and can adjust the car accordingly. You do not want to go to the smog check blind for sure. Also try to see what the smog check people have listed as required equipment and if the pump is required you will have to get one. One from a bus or any other old car would work and you'll need the hook ups to the exhaust too unfortunately. In CA they also test the gas cap for a tight seal and 914s are 30 years old so it could easily fail too. Good luck