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Sire is correct on the balancer, I put my scope behind it and I think I see a bal-ncer. But the performance products site says 72 external balanced and the motor is a 73...

Thanks for the link Krazykuda. I hadn't thought about the VIN tag. The motor is a 73 with J-heads. I'm assuming it is a cast crank then. I'm not sure if the pistons were changed or if the block has been bored or decked. It has a M1 high-rise intake, and a 292* .508 lift mopar cam. It's topped...

Hey guys. So I'm going to be doing a trans swap on my 340 dart once the weather warms enough to free my car trailer from the snow, but in the mean time I'm trying to nail down the specs on my engine. It is a 340 without a doubt but I can't be sure of the year. I can't tell what the number on the...

The slots have been adjusted. Maybe I can get a picture of the inside of if it just so you guys can confirm that the slots have been modified. It certainly seems like a heavily modified mopar unit. It is only mechanical advance. Should I be running vacuum? Is vacuum advance worth the trouble?

Distributor is a customer curved mopar unit that came with the motor. I had swapped it out for a unit with a vacuum advance but it was a rookie move and I didn't realize at the time that the distributor wasn't correct for the motor being built the way it is. So I swapped it in tonight. It seems...

Good call. Ignition. Sorry. I've gotten a couple good opinions, just wondered that everyone else thought.

Hey all. I'm going to re-time my 340 so I wanted to see what everyone thinks for timing. It is a 340 with 10.5-1 compression, J heads with 2.02s, 508 lift cam with 248 duration and 108 lsa. Intake is an M1 with a mighty demon 750 on top. 3.91 gears in the rear. What's everyone think for initial...

Manual brakes on my car, and 3.91 gears. I have a three speed. I'd love to have more gears but the 4 speed would be a big swap. Did you run vacuum advance or all mechanical?

How do those timing and vacuum numbers look?

I just double checked and timing is 24* initial with 40* at 3k. I checked vacuum and at idle the timed vacuum port reads 0, but is 12 at 3k.

In the first video I think the cutouts were open so the only type of muffler involved are a set of 3" straight through dynomax race bullets. They don't do much, but take a bit of the edge off. In the second I may have closed the cutouts and there are a set of magnaflows back there. I usually run...

Also, props to Kuda, the specs on that cam are very close the 508 cam that I believe I have. Nice work.

So Rusty back in the day in another post you talked about this cam with a fair amount of knowledge. You said that the vacuum is pretty bad with it. Could that cause an idle inconsistency with my vacuum advance dist? This car is so inconsistent with the idle. It will idle prefect, you rev it up...

Ok so I did some digging through my notes. I came across a couple of numbers. The big one is 509. I know there were some books mentioning a MP 508 and 509 cam that were pretty nasty. The 508 is listed at 248.5* of duration @ .050" lift ground on a 108 LSA. Is it possible that's what I have? The...

Here's a video showing the tach Mopar 340 cam 2 - YouTube

So I'm trying to hunt down the original builder of my engine to get the cam specs but in the meantime, I've uploaded a video of a 1k idle. Can any of you take a listen and see if you might recognize it. I know it's less than scientific but perhaps a couple of you may have a rough idea. Thanks...

I'm really considering going with an HEI unit. What I'm really trying to work out is all the little bugs that make the car a bit unreliable on the street. I'm always a bit nervous when I take this car out. Trailbeast feel free to chime in here as I know you have some experience here.

Yea it kind of does. I didn't know there was a recall. Glad I found out during the off season before it let me down somewhere. If the old part fails and I can't replace it with a replacement, I would hope they would replace it with the new one. That being said if they gave me my money back it...

Spoke with Don and I guess they recalled the unit I have. $30 for the new one.

Well She starts!!! I put a spark indicator light on front left bank. No light. I have an FBO ignition box that caused me a number of problems when I dropped the 340 in. I upgraded to his latest and greatest, and out of the box it didn't work. He sent me another and it worked...that was two...

That sounds exactly like the problem I'm having! I'm going to swap out the Dist for a customer curved one anyway I think. If I can get the damn thing to run that is!

Ground is good. My ignition doesn't require a resistor. I'll have to double check the box. I don't have a choke, but my garage is heated and has a heated floor. It's at least 55-60 in there.

Hey guys, I'm starting to go nuts here. I have a 340 with J heads, M1 high rise, Mighty demon 750 (which I hate btw), and aggressive cam. I've had an issue getting consistent running with it. I can't seem to get the idle right. It will idle, then you drive it, and it won't return to idle, it...

I posted last week that I was getting a leak I thought was coming from either the rear main for the oil pan. After a little investigation I figured out there was too much oil in the engine. I drained it, and replaced the correct amount of oil. Within 12 hours it had dripped and within 24 hours...

I'm with Rumble. It's easy for everyone else, not just online either, to sit and say do this, do that. You should get this and that and these heads, yada yada yada. But this stuff isn't cheap, and a lot of people aren't making what they were if they are lucky enough to have their job still. I...

I have a stock pan and filter. I wanted to check oil level so I drained the motor and refilled. I put in 4.5 quarts since the filter was already full. With the oil cold, it registers on the dipstick but below the fill mark. So what's the deal, is the dipstick wrong or is there not enough oil...

I don't mean to jack the tread but since we're talking 340s, I hope you don't mind if I ask about my 340. It has a 509 ultradyne, M1 intake, J-heads with the 2.02s, headers, 650 mighty demon. What you think for hp/tq?

I can't speak to the specific number but I would expect it to be higher than that as well! I thought they were close to 325 stock or with very mild mods.

And if the filter is already in and full of oil? 4.5?

Well that makes a difference. I think my dipstick is off.