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I have an unknown harmonic damper, a '71 383 cast crank (external balanced), and a neutral balance flywheel. The vibration is terrible. How do I fix it? Or better yet, can I fix it? I bought a Professional Products PowerForce harmonic damper from Mancini Racing that will be here in a few...

The torque converter in my '73 Charger is bad. I'm thinking of replacing the 727 with a manual transmission. If we don't worry about cost, gears, or fit, and only focus on driving experience, how would you describe the experience of driving of a A-833 vs a TKO-600? I'm asking because I have...

I have a rattle in the 727 transmission in my '73 Charger at idle. It seams to go away at around 850 rpm. I hear nothing while driving and the transmission shifts fine. The fluid color look and smell like the day I put it in. I'm not 100% sure the dip stick level is correct so would too much...

Last night I drove from north Alabama to Atlanta, about 120 miles. The trip started out well enough. I did the normal stop for gas and a drink before hitting the road. The first sign of trouble was just after leaving town with a big backfire and partial cut out going up a big hill. Then lot...

My o-ring is fubar and I needed one yesterday. They are all over online, I know, but I need one quick. Does anyone have a part number for the orange/red speedometer o-ring shown below? Thank you in advance!

So, I'm having a devil of a time trying find the happy timing for my engine. At 15 degrees of timing it idles good, but spitting and popping at WOT. And at 18 degrees, it surges at idle, a rocket ship at WOT but pings on the highway when going from 60 to 80 at part throttle. At 12 degrees it...

My dad has a A518/46RH transmission laying around in Alabama and he's bugging me to do research about swapping it into the '73 Charger. I want to replace the lame 2.73 gears with 4.10 gears but I also want to drive 80 mph on GA-400. My question is there any changes required to the floor to...

My '73 Charger is back on the road after 20 years. Woohoo! The good news most of the bugs worked out. The bad news is the engine is running very rich. I'm getting like 4-5 mpg. The car used 1/4 of a tank just going 25 miles today! I've been trying to read up on tuning the Thermo-Quad but...

I bought the wrong cam for my low compression 383. The CompCam Camquest tool says the XE256H (21-221-4) is a "great fit" for the engine. I plan to buy the whole kit: https://www.summitracing.com/parts/cca-k21-221-4 Will this cam work good for me? Is there a better cam for the engine? Here...

I've never built an engine before and my dad has only done stock builds. We built a 383 bored .060 over with a Sealed Power CS-661 cam ( http://fme-cat.com/overlays/part-detail.aspx?brand=SP&PartNumber=CS-661&pt=Camshaft#.UmXVpd_D_IU ), stock heads, stock intake, and a single bolt timing set...

I bought a set of Hedman Street Headers 78030 for my 400. Now I have concerns about clearing the starter. So, what's the smaller starter I can buy that still spin the engine over quickly?