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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...

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 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!

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

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...

I needed some advice on a build up I am putting together. It will go into a 71 Demon backed by a 904. Rear gears are to be determined. I want a mean sounding, hard running street car that will see the 1/4 mile from time to time. Shortblock: 340 - bored, decked Rotating assembly...

Hi, I am getting ready to build up my 340 with X heads. I will be using the XE268 from Comp. My machinist insists that I use adjustable rockers. After shopping around I don't really feel like dropping that kind of cash for them. Are they really necessary? Or will a new Mopar rocker set be...

I am currently building up a 340 I found on Craigslist for $300.00! I think I scored pretty good on this find. Once we removed the massive amount of rust built up on the motor, I found a stock bore 7/69 340, steel crank, floating rods, untouched X heads with the 2.02 intakes. Needless to say I...

I am building a 340, I have the X heads, and SRP forged pistons that will give me 9.8 compression. What thickness of head gaskets do I need to get as close to 10.5 compression?

Has anybody tried EngineQuest heads on a 340, would they work? They seem to flow pretty good out of the box.

How far can a 340 forged steel crank be turned down? safely?

New to the forum and already have questions. I just bought a 71 Demon with no engine/trans. I currently have a 230 hp 318 2bbl sitting in my 70 'Cuda with the 904 or is it 727 (?) which I plan to swap into the Demon. I plan on installing a Edelbrock air-gap intake, Holley or Demon 4bbl, and...