How many ground straps should I have on my 1969 Blazer. When I took it apart it seems like there was:

1. One inside engine compartment from fender to ?
2. One from frame to body on one side.
3. One from frame to body in rear.

Is that all there is? Do I need more? Help would be appreciated, I'm lucky to operate a flashlight.

I seem to recall one from each valve cover to the firewall?

I checked GMC Paul's website and he has a ground strap kit. His description says :

This set has a complete set of straps and hardware for one truck. Set includes (3) short straps and (2) long straps&necessary bolts. Original equipment on all 67-72 trucks and help to properly ground the engine, body and chassis.

Here is the pic http://www.gmcpauls.com/pictures/Ground%20Strap%20Kit.jpg

Baketown Scotty you should have a total of 5 ground straps, 3 under the hood, 1 under cab, and last under the bed
1. One inside engine compartment from inner fender on pass. side to frame
2&3. One from each valve cover lower rear bolt to firewall
4. One from frame to front cab support.
5. One from frame to 2nd from rear or rear crossmember.
GMCPaul

Great. Thanks guys.

What exactly do multiple ground straps do? Why more than just one?