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If you post a clear picture of the vin numbers stamped on the passenger side of the oil pan rail just below the casting date I'm sure someone will decode it for you. Also, the numbers stamped on the top driver's side of the block just below where the head bolts on will tell you exactly when and...

The Jesel catalog or website should have the part numbers and what they mean as far as offset pivot length ratio etc..

Those flow numbers are with 1.94" intake and 1.625" exhaust valves at 28", easily 500+ hp with good parts and quality machining, especially with the combustion chamber designed the way it was. Those heads were decades ahead of their time, SB2 heads and most Nascar heads were copied from them in...

NHRA class rules for superstock dictate the as delivered from the factory accepted CCs for cylinder heads. They fill the bottom of the ports to be able to raise and re-shape them for better line of site and airflow potential. It's been proven many, many times that improving the line of site and...

I've ran copper heads gaskets for many years, 25+ and never blew a head gasket. O-ring the block, use studs, and use Hylomar around the water jackets. They don't require a special RM finish like cometic ones do, better heat transfer between the block and head, nearly impossible to burn out or...

It would be great if all the owners of 340s they've collected over the years would post the vin numbers of them. Even if they have no desire to sell them, guys looking for their long lost engines would be thrilled to know where they ended up.

Medice mfg in Greenville PA makes valve cover spacers that will do what you need. Google for their website.

Freezing parts works. It toughens the metal. You machine blocks AFTER freezing, your machinist will be able to tell the difference as its harder on tooling. If he can't tell the difference it wasn't done correctly or you need a new machine shop. Gears and sliders in manual transmissions last...

Out of a 1970 dart swinger.

Post a picture of the vin number and the numbers stamped on the top front drivers side of the block for more information on when and where it was assembled and for what model year car.

1970 dart swinger 340.

Would you please take the time to list the casting dates and vin numbers of the 340s you have? Guys are out there trying to find and reunite engines and transmissions back to the original car they came in.

It was assembled in Windsor Ontario Canada on Friday February 6th 1970 and was the 245th engine assembled that day.

Remove the valve springs and check the spring seats on the heads. A lot of the time they will crack and leak large amounts of oil..

How about posting the vin numbers on your 7 blocks? Guys are trying to reunite engines and transmissions back to the original cars they came in. You could help reunite them and make a new friend along with some cash...

trucks have front mounted sumps. I don't think a 340 was an option in any truck ever built but I could be mistaken. Post the vin number that is stamped on the passenger side oil pan rail and someone will tell you exactly what it came in.

If it is not numbers matching to the car, why don't you post pics of the vin number and casting numbers on here? Someone may be looking for their long lost 340 to put back in their car!

are you sure it's a 1971 motor? just looking at the color it could be a 1970 or older 340. Can you post the casting date on the drivers side of the block, and vin number that is stamped on the passenger side oil pan rail please. Someone may be looking for their original motor.

Have it welded by a professional shop that specializes in cast iron repairs. Not a bit deal to do, just may cost a bit more than most want to spend. Since it's a rare numbers matching block/car, I would not hesitate to weld it.

just 3???? LMAO I wouldn't let 1 of those 3 you mentioned (won't mention his name) put gas in my lawn mower let alone machine anything for me... There are a lot of very capable machinists/engine builders out there, most won't be found posting on the internet though.