I am sending this to you'll in apprication for all the help that everyone has given me.

I have a 1972, SLC with the 116 (350 engine), electronic fuel, 91,000 miles. Lots of sitting will take its toll. Anyway, I have found an aftermarket product that has just done WONDERS for this old beast. I found this product on the web at www.directhits.com. I never believe marketing information about any product that I have never used. But with a money back quarantee!! I took a chance.

What I have experienced within about a 1,000 miles so far:
1. Able to reduce smoke out the tail pipe
2. Better cold start
3. Around town mpgs up 12%-15% (wonderful) love that
4. Accelaration up 10 more MPH in the 1/4 mile
5. Throddle responce is the difference between night and day
6. Hwy mpgs hardly changed, maybe a little, I think this is because I have some very very short rear gears, tacking 4,000 rpms at 80 MPH. And on these hwys you have to run that to keep up with traffic.
The set comes with product, custom made spark plug wires and plugs. [URL=http://www.directhits.com]

Hope this helps someone else.