Robert Weaver

How would I know if my charger has/was Smog equipped? I've been lookin at diff heads online and didnt know what the big differences are?

Coronet 500

This would be a good purchase. http://www.autobooksbishko.com/Items...anual/669.html

I'm sure if you search the web you'll find an answer. The '74 emission systems were quite simple.

TVLynn

What year ? Calif/Federal standards ?

moe7404

if was built after 1963 it has some smog specs. but the serious smog started in 1968. and even more in the early 70s. in 1967 i was in high school auto class. my teacher told us the government was going to control cars exhaust pollution. and i thought, OH no all we need is the government telling us how to build cars. was i right or WAS i right?

Robert Weaver

Def right.
I believe its federal. 74 Charger 5.9 360 la Stock

1. Can u run with mixed heads? (1smog, 1 non-smog)
2. Would the Block Casting #'s give me a more idea if its smog?

Coronet 500

Exhaust Gas Recirculation is done through the Intake manifold.

Air Injection System has a pump which injects air at the exhaust valves through holes at the bottom of the exhaust ports. This came on Dodges after 1974, yet these can be used on any year if plugged.

There are no problems with running "mixed" heads other than valve size and combustion chamber size. You should be able to measure valves and visually compare chambers with any head and be confident they will work.

Robert Weaver

K cool, so if there's no Air Pump anywhere it probly isnt Smog right?

demetri

Many big cities back then were like China, the skys were brown, not blue. There are probably 20 times (may be 100 times) more cars on the roads now than back then. Can you imagine modern cars having the same emissions as cars back then?


May be the population would have been about 1/3rd of what it is now, so there would have been much fewer cars on the roads There would have been far fewer people asking for pensions, and the government would have had a balanced budget.

Robert Weaver

K, if I bought a Head from Rockauto.com, are the "Head Plugs" that look like an "Allen Wrench Screw" work for pluggin the Smog Holes?

Also, which Holes need pluggin?

Just tryin to save some $$...

moe7404

if you have never worked on 1970s cars you have not faced the nightmares i have. at one point mechanics said that ford made the computer system of the week. trying to control emissions. the electronics wasnt that great. in my high school auto class 1967, we saw pics of L.A. with a brown cloud over the city.

demetri

Yes, I have never worked on a 70's or early 80's car, nor I want to. But it was a transition. Trying to get the emissions with 50's technology, and typical resistance of big (American) corporations to adjust to new technologies. The EFI technology was available then, but the big 3 did not want to invest in it. I have been working on a 73 Volvo with EFI (was available since 71). The engine itself is a late 50's design (much like the Chrysler RB) but has EFI with many modern aspects to it. Trickier than carburetors to work on, but somewhat reasonable in terms of reliability, driveablity, and yes, even performance.


Frankly, I think the public was largely responsible for the junk Detroit made in the 70's and early 80's. There were lots of 60's era cars in good condition but rusting in junkyards. If the public refused to buy these 70's cars and continued using the older superior in most ways models, Detroit would have been forced to adjust properly ...


But anyway, as a car enthusiast, I am also disappointed that the government ended the great American car of the 60's, but the automobile had started becoming a serious social problem, and government intervention was necessary.

Robert Weaver

K, if I bought a Head from Rockauto.com, are the "Head Plugs" that look like an "Allen Wrench Screw" work for pluggin the Smog Holes?

Also, which Holes need pluggin?

Just tryin to save some $$...

moparted

I wouldn't buy rebuilt heads from rockauto.

TVLynn

Most exhaust manifolds will cover the emission hole without doing anything. Otherwise if you are concerned with headers pound a steel/ brass ball in the size needed into the hole 1/8"? Rock auto heads ?? You take your chances just like you would at the local machine shop