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So I picked up a nice 72 Satellite that is powered by a 360 magnum roller block but it’s topped with LA style heads that I haven’t identified cause the casting # is on the bottom and a cast iron 2bbl intake. I’m thinking of throwing in a small cam, I have a set X heads along with a Performer...

What weight is recommended for a 71 Demon, 340 setup. Street use with the occasional trip down the 1/4 mile. I currently use a Ram 28# flywheel but only after a few hundred miles the ring gear came loose. I tried calling them but they're all about emails now and I've been waiting with no...

I got a customer at my shop and I've been upgrading his brakes and suspension but then we got to talking about his engine and how it was setup. I could tell it needed carburetor tuning and timing re-curved. I did that and it runs a lot better but I can't do much for it's driving manners. I...

As I’m nearing the final phases of my build it’s time to face the exhaust routing which I was hoping they would exit at near stock location with factory tips but since I relocated my rear leaf springs inboard not sure if they will clear has anybody successfully ran the tail pipes all the way out...

Hello friends, helping a buddy out cross country so I'll give you as many details as I got. 1971 Demon 340 727 8.25. Stock 340, slightly hotter cam (no idea on specs) headers, Torker and new Brawler 750 VS jetted at 75/83 with 35 deg total timing. He got a peak numbers of 254hp/292tq with 9.4...

In the final stages of my 71 Demon build and I had all my new interior in minus the rear seat assembly. I sent them to get reupholstered and when I attempted to reinstall I noticed it doesnt quite fit correctly. The bottom cushion hooks don't line up and the lower rails push it upward. Can...

I'm looking for recommendations for my 71 340 Demon. I've done the entire USCT setup on it and currently running the cheap blue Monroe shocks and the 1.04 torsion bars. I also had the vehicle at the lowest ride height setting, car drove great felt solid but just not enough damping. I will be...

Calling on the solid cam experts here. I am working on a small block with a solid flat cam. The engine only has about 100 miles on it, engine was built and sat for about two years before turning on. It was generously lubricated during assembly but the FI system failed to start up successfully...

I completely rebuilt this motor and spent some generous time repairing all the plug hole surfaces since they had ALL been marked at 3 points with a center punch likely. I first assembled the motor using the steel narrow lip freeze plugs and I applied shellac to the surface. Well I'm sure you can...

1971 Demon p/s gear box. Just fired up my motor and dealing with all the fun surprises. I was looking for tips on removing the top seal of my p/s gear box or worm seal. Looks like it should pry right off but I am looking for the wisdom of the forum before I go and screw it up. Thanks!

I'm near firing up my 340 and realized a small leak around my water pump bolts, so I learned those reached the water jacket. Upon doing a bit of research I am realizing that there may be a few other in other parts of the motor. Do we have a guide indicating which bolts need sealant? Thanks in...

I am 99.9% done on my 340 install, basically lacking my break in oil and gasoline to fire it up. When I decided to revisit my Hughes solid camshaft instructions. I must’ve skipped the strong recommendation about removal of inner spring during break in. Pissed I didn’t do it but glad I read it...

I’m assembling my 71 Demon and stumbled on to this. It’s been a few years since I disassembled the car so I can’t figure this out. Anyone know what part this is or where it goes?

I am wanting to use the original style black wrinkle finish unrestricted air cleaner for my 340 FiTech build. Who sells is and will it fit my throttle body? Thanks for any advice..

Is my steering column missing something to center the shaft on the housing? or is it normal for it to float like it is. I believe the gear selector leg was removed just not sure if that's what centers the shaft or if it's lacking another bushing or something. Thank you

I know this subjects been beaten to death and Ive read through many threads regarding these header installs. I just have a few more questions I'm hoping I can get some help here so I can decide which headers would best be suited for my setup, which is basically a '71 Demon with a 340 but with a...

I need some help here. I assume I need another pressure just don't know which one. All accessories including hose is off a 1970 Barracuda 318 and all is being installed on a 1971 Demon 340. Both applications show me the same part # for the pressure hose. I'm stuck.

Anyone try using the original vapor-liquid separator? From looking at the diagram of how it works, looks like the best way to vent my new efi setup. I figure connect the three vapor hoses to my top tank vent line, then connect the vent-liquid return line to my fuel pump vent inlet to return any...

I installed my 340 into my 71 Demon the other day using the factory K-member, '70 e-body 318 engine brackets and new replacement motor mounts. When facing the engine bay from the front of the car the engine is very crooked. At first I noticed the mount on the driver's side seemed to sit wrong on...

Im in the process of finishing my 340 build and would like to close off all engine openings to avoid dust or critters from entering my motor. I need spark plug selection advice. My motor is a .040 over stock stroke 340. Aluminum heads, 242/246 solid flat cam, 11:1 compression and I will be...

I'm using the Milodon 30936 for my 340 on a 1971 Demon. Stock K Member and Hooker competition headers. Anyone have any experience with this oil pan and whether anything had clearance issues? Thanks!

Anyone know what exterior color combos existed with blue interior? I am about to paint my 71 Demon which is a factory B5 blue and I am considering a different exterior color, Just not sure what else looks good with the blue interior.

I bought my 1971 Demon about 4 years ago and it's been sitting since. I own a high volume collision repair center and it's hard to get your stuff done when so much is going on. I decided to finally get on it. My car is only getting older and well I am too. I had it blasted to see what I had to...

Heads were rebuilt but I decided to go aluminum before bolting them on. They are clean castings and machined very well. Brand new 11/32 bronze guides and new valve seats. I transferred all valve train to new heads. Asking $500 obo plus shipping. Thank you.

Well I decided to order a set of Toth Performance CPPA Street Avenger heads. I talked to Bruce who seems a very knowledgable Mopar guy. He set me up with a set bare castings. Chambers are 68cc and intake ports are 170. I don't have a flowchart to share but I saw them flowing 250 @ .550 lift

I have an opportunity to get a decent deal on a TR6060 off a Viper 8.3 L. Can it bolt on to a 340? From what I can tell the bellhousing looks very similar. What clutch/flywheel setup would I need. Any help appreciated.

Getting ready to start assembling my 340 soon and as I visually inspected my rods and Pistons I noticed I couldn't find any indicators to show which way they should be pointing once installed in the block. Can anyone point me in the right direction? Pistons are new SRP 142068 and rods are stock...

Ok so as I've mentioned before I'm building a 340 and have some X heads ready to rock. I thought I was good to go forward on my build and was planning to run around 10-10.5:1 compression on pump gas. After talking to Hughes Engines I was advised that was not possible with Iron Heads. He said I...

Besides the Edelbrock heads, what other heads are available? I see Speedmaster and the recent introduction of ProMaxx. Can anyone share info on experiences they've had with these heads? I called ProMaxx right now and they quoted me 1090.00 for a set of 65cc bare castings. I'm currently...

Ok so I am starting to build my 340 for my 71 Demon and I'm looking at my accessories donor 318 (70 barracuda) I notice that my mounts don't match up to the Demon subframe. Can someone enlighten me as to what is my issue and how to correct it please..? It doesn't have the holes for the cross...