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I just went from 2.8:1 gears to some 3.55s and have found (using my GPS) the the speedometer is WAY off. I know I need to change the speedometer gear, but don't know what kind to buy or how to change it. The car has the Ford C4 3 speed auto transmission, and 215/70r14 tires on it, with newly...

First off, let me say happy holidays to all. I've managed to reel in some cash for Christmas and am looking to upgrade my stock rearend. I have the stock 8" rearend with 2.79:1 gears and an "open" type differential under my 66 Fastback. I was wondering what you all might suggest to me...

SO I'm havingsome trouble with the brakes and I bet you guys could help. I have a 66 289 with 4 wheel power drum brakes. A couple weeks ago both of the brake boosters went out. We replaced them and it worked well for a week or so. One day, I get in and I only have about 1/2" of brake...

What's the narrowest rear that'll fit in a 66 fastback without any trouble? I've found an 8.8 that's been narrowed to 55.25" from mounting surface to mounting surface, and was wondering if that would work for me, or if i would run in to trouble? Anyone know? I'd really like to jump on this...

Hey guys. So I'm looking to upgrade my gears in the 8" I came across this listing on ebay and was wondering if it is worth the money? http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=230022705417 If I figure $150 for gears, $130 for an installation kit, and $200 for shop...

Hey guys, As the title states, I'm having issues with my brakes. It's got 4 wheels power drums with a single bowl master cylinder. I personally don't have a problem with how they work, but my dad doesn't like it one bit. Basically the problem is, there seems to be a bit too much travel in...

Since I know there's a TON of experience on here: Does anyone have a rough estimate of how much torque and horsepower I might have gained on a mildly built 289, in switching from a stock 4bbl intake to a Weiand Stealth intake? I know it saved me about 20 lbs in weight.:) Thanks guys.

Hey guys, My right rear light is basically dead. I replaced the light bubl, cleaned the connection, and changed my brake switch and still nothing. After I did all this I started checking for current. I found the wire (orange/blue) coming out of the steering column and tested it, nothing. My...

Hey guys. I have a 4bbl Holley carb, P/n- 0-80457S I'm running really rich (I can occasionally get a whiff of gas while the engine is idling) I was wondering how to properly tune the carburetor, so as to improve my gas mileage and have my engine run a little bit better. I have no...

I was just wondering as to how much power the stock rear end in a 1966 Mustang Fastback would hold up to? If you need any other info I'll get it up as soon as possible. Thanks for your replies.

How in the hell do you get that damn piece of cardboard into the glovebox???!!!

Ok, soo, when I try to start it the starter doesn't have enough juice to turn the engine over. Our battery is only a week old, because this is the second time this has done what it is doing. Our last abttery did this same thing after a couple weeks, so we got another and now the new one won't...

Ok, so as it says, we have no brakes. We have all around drums. Single bowl MC that we replaced yesterday. We've bled the brakes several times. They work at slower speeds but not great. We can lock the backs up somewhat, but not the fronts. The brakes are temperamental, and occasionally have...

Hey guys. I've got an oil leak and can't tell where it's coming from. It's the original 289, C4 combo. Engine was rebuilt recently and maybe has 2 miles on it since the rebuild, if that. It pours smoke from underneath the car, which we have determined is from an oil leak dripping onto the...

Hi guys. I searched for an answer to my question but really only turned up stuff on the newer mustang boards. Question: We get continuous voltage into the instrument panel voltage regulator and pulsing(intermittent) voltage out to the guages. Is this normal? Our guages aren't working. We do...

Where does it attach? We dont have an extra hole the right size on our intake manifold. Any body have an pictures? Any help greatly appreciated. Oh ya, Almost forgot. 66 Fastback, 289, 4bbl intake, c4. If you guys need anything else just ask. Thanks