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Anybody else using a demon carb and having problems with it? I hear that they are junk, I'm starting to agree. Can't get this thing dialed in right. Either runs pig rich or stumbles on its ***. I'm only using it because it was "free" lol. What did 71 340s have stock, I know themoquad, but what cfm?

I bought a 71 340 engine last year that had the same thing done. I just removed them with a sharp pick and put new head gaskets on. Been fine for a year now, drive the car every day. The bummer was tearing it apart to do this because my machinist said it wouldn't hurt a thing and just put...

So what would you guys recommend over the purple shafts? I see comp has a .474 very similar. I want this thing to be streetable, with a nice sound. Nothing too radical. This thing was an absolute dog, I been in stock 318s with more umph than this had. So I figured instead of putting lower gears...

Ok, that's what I wanted to know, thanks. Oh, it didn't even make it out of the garage. Shut off in drive and I got fed up and tore her down again.. I hate automatics. Lol

Sorry forgot... 3:23 sure grip I don't have a stock converter actually, the car had a 545 lift cam with a I believe 3200 stall when we bought it. I want to make it more streetable so I downsized to a 508 purple shaft with a 26-2800 stall. Car wouldn't stay running in gear. That's why I'm now...

Before I call summit tech, figured one of you guys could help. Putting a 474 purple shaft in a 10.5-1 .30 over 360. Could I use a stock converter? If not what stall should I use? Thanks for any input. Dustin

Ok. Thanks for the replies! I'm at 40 now, might just let it there.

What should I gap my plugs to using a msd box.

Ok thanks for the info. I'm not familiar with Msd setup. I took the car out yesterday for the first time and it's a real dog. I set initial timing at 10 degrees for starters. I guess I'm just used to fairly stock engines and old school ignition ..

Where should I set initial timing on my 360? Automatic with 2800 stall 545 lift cam MSD ignition

Looked there already. Don't see any like mine though? Mine is cast

Is there a difference as far as balance between a 340 and a 360 crank pulley? I know that the balancers are different. I'm asking because I put a cast 360 crank pulley(because that's all I had) on my 340 and I have a vibration.. Thanks for any guidance as I'm new to SB

How do you know? Lol just kidding! Been there before! So....what exactly is the difference between between a 1139 and a regular 65 Autolite plug?? Just the ground strap? What about heat range? Man there are so many options for plugs lol..

Ok. I got a bone stock 71 340 with J heads, mild cam, and factory points. Think the 5's gapped at .035 would be ok?

I agree bosh platinums are very nice. I tried getting those last year and parts store said they discontinued those?

NGK FR5 V power?

Ok cool, so not many Autolite fans. Lol

Ok, just wondering. I have auto lites in my 340 and thinking about changing to champion. People cringe when I say the word champion but I know that's what mopars came with. Anybody run NGK?

Ok, may be a dumb thread, but what brand spark plugs are y'all using? Any champion fans?

Like 70aar said.. Throw away cork seals and use a bead of silicone about 1/4 inch thick.

We use actuall car clear coat that you mix with hardener and spray with gun. You could use rattle can clear, which I have, but it tends to dull after some time. With the hardener it really prolongs the finish of your engine and it takes a lot of heat.

Yup, made that mistake before..

Here's a 360 I recently did

We do all of the above, plus clear the whole engine. Holds a nice shine and makes wiping off oil and water a breeze.

Okay, makes sense. So as long as the oil holes are lined up, there is no left, right. Thanks guys

I am going through the same problem.. Seems to be a problem for these 340s? Wonder why? And good luck, I tried pulling through the casting holes with no luck, had to pull intake :/

Ok thanks guys, I'm asking because I have to replace a noisy lifter anyways, figured now would be the time to switch around rocker shafts if needed. Thanks again

I know there is a right and left rocker shaft, but can't remember which is which.. Can anybody tell me which way the "notch" goes? Thanks in advance

Can a "early" style cast water pump be used on a 71 340?

Only other thing I can think of is a previous owner o-ringed the block for some reason. Are you suppose to use a "special" gasket with o-ringed blocks?