Ok I have a list of questions I need to know about this 305 I have of mine. I will not ask them all at once so not to get everyone confused but I will start out with a couple here. First off this is a 1985 Chevy Custom Delux 10 truck. It has the original 305 with AC and carburated. Here are my questions.
1.) On the exhaust manifolds there are these metal hoses comming out of them. One on each side. The go to this little round box looking thing and a wire or two from that box to a thing on a belt pulley below the Alternator. It looks like an alternator but isn't of course and that is all that is up to that thing. What is this thing?
2.) Can I take it off and not have those hoses and run some nice headers?
3.) Ok I need plugs and wires very bad. I see there are wires for over the valve covers and then some for UNDER the headers. Which look better and cleaner and will either one work?
4.) What are some good plugs?

I plan to get that HEI upgrade kit from Pertronix with the 50,000 volt Ignition coil and all so will need thick wires like 8mm I guess.

Thanks for any help here! I am in need of plugs and wires bad so thought I would change headers and everything as well. I took or tried taking a plug out and they were like froze in there, I took this heavy duty lube and sprayed it all over and plug snapped off at the block. Luckily only the top part did and I was able to barely get a wrench and take it out still. I haven't messed with the others yet. The truck is running real rich and the plugs were changed before the guy said but foul he said as well. They were really black and caked with oil. I don't know if it's burning oil as well or what but I will do the plugs and wires, drive it and see if it's burning any oil and go from there.
Ok well thanks again!

Shawn-