Again not an engine guy is the  CS766 an RV cam? Specs are at the bottom of my first post.  

The Sealed Power CS766 cam is basically a "stock" replacement cam for 350 Chev engines in the 82-86 year model range...including the L83 Crossfire. It will work otay in your engine, assuming the rest of the engine is close to stock specs.

If you're interested, here's a really good article on Cam Specs, and what they mean.


|UPDATED|3/28/2016 7:40:33 PM (AZT)|/UPDATED|

Thanks I will read that article.  I did a smoke test on my engine vacuum system and that is a wonderful process.  We found some vacuum leaks that need to be fixed before I do anything else. 

I have to identify a switch and I will make a new post for that and I have to order a couple of parts and replace them.  Then we will re-due the smoke test and see where we are.

Thanks again for all of your help and this is one of the reasons this is the best forum on the web.

What is this smoke test you speak of?

Smoke test is the greatest thing I have witnessed to find vacuum leaks. 

What is done is they plug this machine into the vacuum port on the intake manifold.  It pumps smoke into the engine that then goes throughout the system. Anyplace that there is a vacuum leak you see smoke even pinhole leaks are visible.

You have to block off the carb or in my case the two TBI's along with any place that normally air is sucked into the engine because a lot of smoke will come out of those area.  

I should have bypassed my check valve so it could have checked the complete vacuum system including the lights, wipers, etc.   I did not and will next time I do it.  The best part is it was free.  But even if it was not if someone is chasing down vacuum leaks or just want to make sure their system has no leaks then this would be a great test.

But I would prepare for it better.  One I would make sure I brought with me items to block of carb or TBI.  They used a rag.  I'm thinking a soft foam ball cut in half to push into the TBI's also the plugs I use to block the IAC intakes.  I would also make something to bypass the check valve so the complete system could be checked.

In my case I found:
the IAC leaked around the shafts really bad
A vacuum hose had a pin hole in it. 
Also the cruise control relay was open  (Not sure if this is suppose to be that way or not yet will have to find out.  I know that it opens up when you press on the break to disengage the cruise control)

The independent shop I have been taking my cars for over 15 years has one of these he purchased because he does a lot of BMW and Mercedes work.   He purchased this machine that does more than just smoke to help him troubleshoot them.  Those two manufactures have put vacuum systems in their cars that cause lots of trouble once the car is 6 or 7 years old.

Hope this helps explain it. 

Smoke machines were developed to aiding finding leaks in Evap systems, but their uses are varied. They work well in finding water leaks around windows and such, too.
It's basically a container with a heating element, and small air pump. We use baby oil as the solution to heat, and create the smoke. The air pump pumps the  smoke under low pressure(usually less than 10psi) into whatever system is being tested for leaks. Pumped into the intake, the smoke will find it's way to even the smallest leak, and you can visually follow the smoke to the leak. Some oils have dyes to make the smoke more visible, but the normal color is white...fairly easy to see, in most cases. They can find a leaky gas cap quickly.
Good smoke machines will also have flow meters that tell how much of a leak is there. They're super critical in finding leaks in evap systems, where the manufacturer(and the EPA) can specify that a leak in the system not be greater than 1 psi per hour, or per WEEK....think aboot that.
You can find smoke machines on ebay for around $100....but those things look, and prolly are, dangerous. A real machine will set you back over $1000...which is why not a lot of places have them. We have two here at the shop....they get used regularly.

|UPDATED|4/1/2016 9:29:47 AM (AZT)|/UPDATED|