Learn more about the famous Oregon Coast Lighthouses by reading these questions and answers. Caller ID is great to have, but there are certain situations where you don't want the person you're calling to have your number. Blocking Your Number on a Call by Call BasisIf you only want to block your number on a specific call, you can type in a code before you dial that will disable the Caller ID for that one call only. Blocking Your Number for a Specific ContactIf there's a certain person that you have to call on a regular basis, but don't want them to have your number, it's as simple as editing the contact number. Blocking Your Number on AndroidJust like the iPhone, you can turn off Caller ID for all calls on Android if your carrier allows it. A Few Things to RememberWhile most of these methods will work just fine for ordinary calls, there are a few situations where it's very difficult, if not impossible, to keep your number hidden. This is really great specially when you don't want the person is calling or it really annoys you, then you can finally block it. Note that the '68-'69 (and a few rare '70 472s) use a block that looks identical at first glance, but bears different casting numbers (ending in 6238), has smaller oil passages and does not have clearance for a 500 crank (rod bolt notches in bottom of cylinder bores).
One easy way to identify a 425 or 368 vs a 472 or 500 Cadillac engine block is to look at the rear of the block. Another way to identify a 425 or 368 vs a 472 or 500 Cadillac engine block is by the shape of the timing cover or the opening it covers.
The 425 and 368 crank is the same stroke as the 472 crank, and is physically interchangeable, but this is not recommended due to balancing and weakness issues.
The last 3 digits of the casting number can always be found on the bottom side of the head, in a recess under one fo the center exhaust ports. The third place the casting number can be found is on the top of the left (driver's fromt, passenger's rear) exhaust port. When ported and equipped with oversized valves, considering the same level of port work, the 76cc heads outflow the 120cc heads, making them a better choice for maximum performance.
The un-ported aluminum heads outflow most ported iron heads, with the exception of our best iron heads. There is some variation in the first few digits of the casting numbers for various reasons. People who sometimes use their personal phones for work may not want clients knowing where to reach them outside of work, and anytime you're dealing with Craigslist, it's better to be safe than sorry.
Just find the disable code for your country or region and add it to their number (before the area code) in their contact information. If it's available in your area, you can contact your carrier and ask them to activate a per-line block on your number so that it is automatically blocked from Caller ID on all outgoing calls unless you decide to deactivate it.
Some carriers (and countries) don't make this an option, though, so if your iPhone either doesn't have the option at all, or the switch is locked so that it won't toggle, blame your carrier. This way, calls to people you don't know are automatically anonymous, but you don't have to unblock your number each time when you want a friend to know it's you.Because Apple is so picky about what they allow, there aren't many options available in the App Store. Hide Caller ID ($1.09) lets you block all calls or set up black and white lists for specific contacts.


Most toll-free 800 and 900 numbers do not allow Caller ID blocking, and if you place a call to 911 or any other emergency or government service, your number will still pop up.Some lines do not accept calls from numbers with Caller ID blocks enabled via a feature called anonymous call rejection. Since many Cadillac 472 and 500 engines use the same block, and the later (425 and 368) engines look similar, as well, you'll have often to have a look deeper than the block casting numbers to finally determine which species of torque animal you have there. The block casting number is found at the rear of the Cadillac engine, between the intake manifold and transmission bell housing, right next to the oil pressure sending unit. The 2 smaller engines have a 'box' shape cast in near the oil pressure port, which makes identifying them at a glance fairly easy. The later blocks have a pronounced extra cutout toward the passenger's side of the opening, and extra material on the timing cover to cover it. The 425 and 368 crankshafts can usually be identified by a scalloped shape to the flywheel mounting flange. The full 7 digit casting number can be found on the top of the head, between the rocker mounting points. This recess does not get machined when you surface the head, and hangs out over the lifter valley, so you can read it with a mirror after pulling the intake manifold, if it's not covered with crud. The aluminum heads also have much more room for porting than the best iron heads, so they can be ported to flow much better. While all '70-'76 Eldorados and all '75-'76 cars (except the Seville) came from the factory with a 500, it is generally very difficult to tell if the engine is original on a 30+ year old vehicle. If you don't think you see your casting number, start at the end of the number and work backwards. For instance, the code for North America is *67, so you would dial that before the area code and phone number. Some carriers offer this feature for free and others charge an additional monthly fee, so contact your service provider for details. If your iPhone is jailbroken, though, there are a few Cydia apps you can try, like Bluff My Call or Caller ID Faker.
Another popular paid option that works similarly is Secret Sheep ($3.95).Don't want to pay?
Unfortunately, you do have to pay for it by buying credits (like a prepaid card), but they do offer one free call to try it out. If you try to call a number with this feature enabled, you will hear a message informing you that this person does not accept anonymous calls. This '74 piston has no swirl chamber, no valve reliefs, not even the 8cc depression of the '74-'76 500 piston (round dish, approx. Be carefull breaking loose the carbon buildup if you plan to use the engine without rebuilding it - that carbon grit you break loose will wreak havoc in the engine (bearings, etc). This is another quick way to ID a core as a 425 (head number 423) when junkyard hunting, etc.
There is no off the shelf high compression piston (over 9:1), in production at this time, for the 120cc heads.
The power limit on the ported iron heads is well beyond what most bracket engines are built to make.


Mid'70-'73 engines do not have the heat passage around the carb, and have a round choke well with what looks like a freeze plug in the bottom of it. In this instance, you can temporarily activate Caller ID by dialing *82 (North America) before the number. The Dish is shaped something like a figure 8 or 'squashed peanut', and is sometimes described as 2 overlapping round dishes.
The '250 and '902 heads are equipped with built in smog rails, while the '950 heads were not.
As for flow, the 76cc and 120cc heads flow within a few percent (all 5 castings) with stock valves and no port work. Of course, it is worth noting that the fastest Cadillac powered vehicles out there have our ported iron heads, not aluminum heads, because there is a lot more to going fast than just airflow. In most cases, if they are the same year, they will be absolutely identical except for the crankshaft and pistons.
While we provide the 'official' full casting numbers in this chart, we only use the last 2 digits to ID cranks, the last 3 digits to ID heads, and the last 4 digits to ID blocks, and that method is always accurate. You can find a complete list of unblocking codes here.None of these methods are 100% guaranteed as the rules and options are different for each carrier and country. Note the ID picture is of the current replacement piston, which has valve reliefs not present on the original. Most custom forged pistons have the name of the piston manufacturer on the inside of the skirt, as well. Not all '250 and '902 heads were drilled for smog rails, if they were installed on a non-smog '70 car, even though the extra material is in the casting. If it's very important that you make a call anonymously, you should make plenty of test calls first to make sure it works. Note that while electric chokes and HEI distributors were '74-up only from the factory, it is not un-common to find them retrofitted to early engines. If all else fails, you can always use a pay phone or Google Voice as a last resort.Lastly, because of the FCC's Truth in Caller ID Act which was signed into law in 2010, there are a few minor legal concerns. It's perfectly fine to use any of these methods if you're just trying to be cautious, or for a harmless prank. It is, however, illegal to spoof your number or provide misleading Caller ID information "with the intent to defraud, cause harm, or wrongfully obtain anything of value."You can find more information on the act by visiting the FCC's website, but it's pretty straightforward.
Basically, as long as you're not hurting or stealing from anyone, you're golden.Do you know of any other great tips, tricks, or apps to block your number from Caller ID?



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Comments to How to block a number uverse

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03.10.2015 at 10:54:57

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