I have my Grandfathers '74 Dart with 70,000 miles on it. I drove it for about 5 years back in the '80s and now I'm pulling it out of storage. At some point I will convert to a super six setup but for now it is stock. What is all the junk plumbed into the carb (polution controlls) and can any of it be removed with good results or should I leave it as it is?
thanks for you advise, I've learned alot about my car already just reading previous posts.

Welcome on the board. You'll want to pick up the three books described in this post. For the rundown on emission equipment, see this post. You'll want to bypass your '74's OSAC valve, for example.

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Too many people who were born on third base actually believe they've hit a triple.

OK, I've got the 1974 Chassis service manual, checked out the OSCV valve, what about the EGR can that come out with no ill effects? Any other suggestions to look at, the manual has a large index for emission controls. My main goal is to improve gas mileage without ruining the performance or improve it also.

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Grandpa's 1974 Dart Custom 4 door 225 auto, Aluminum Radiator, 1920 Holley.

You can remove the hose to it and flip it around so it's 'plugged' and that will eliminate it (remove the vacc. reservoir on the head/ 'the hockey puck with spaghetti coming out one side', and cap the tube on the side of the carburator that it was attached to).. if your car starts to ping under part throttle and cruise you will either have to 'recurve' the existing distributor, or leave the EGR in place to knock the 'knock back', you may have to give up a few degrees of timing, a smigde of power either way it goes... Eventually you'll be wanting to go for a super six setup and a better exhaust pipe for that mileage and power increase...

Another thing on your 'to do' list will be to rebuild the carb if it's OEM (Holley 1945, circa 1974 model year...), and replace the main jet (just ask for one for a Holley 4 barrel they are the same) from a #58 to a #60-61 (like the 75-76 models)... (you will get a bit more power out of it, but if you put your foot into it, you will lose some mileage there too... ).

good luck,

-D.Idiot