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I have never had issues like this before in the last 55 years of working on engines. I purchased a reground cam from Oregon Cams and I am pretty sure the issue is NOT with the cam but with the new Cloyes 9-keyway timing set part # 9-3503X9 street billet true roller. I am hoping that someone can...

I just pulled them out and they are all straight and the cup ends are looking good until I checked the ball end and they all have same flat spot, these don’t look good. I’m making a cam change going a couple sizes bigger and I was hoping that I could use them, but after seeing this I have my...

Well I finally have time to dig into the 340 that came in the Dart I bought and I pulled out the cam to see what it could be. There are 2 sets of numbers on the end so I am guessing it could be a regrind. 270AH-8 7085 It definitely is NOT a Comp Cam 270AH, this cam sounded like a step above a...

I am in the process of tearing down my 340 for a Cam and other parts change and I’m looking at the Power Brake Booster and it looks like I will not be able to get to the 3 valve springs closest to the firewall because the Booster is in the way! Is there any way to remove the valve springs with...

I finally had a chance to check the compression psi on my unknown 340. Unknown Fairly mild cam Cold engine No squirt of oil Minimum 8 rotations Cyl: 1 167 3 172 5 165 7 167 Cyl: 2 180 4 175 6 180 8 165 What is your opinion. Thanks

I have a 69 340 with passenger side timing mark pointer location. I’ve read about 15 posts so far and I haven’t seen an option for purchasing a new balancer with the timing marks on the passenger side, does any company offer one?

Just trying to understand valve spring technology and usage! Has anyone used the Hughes HUG1110P valve spring on a cam that has over .500 lift? Yes No Issues?

When I purchased my Dart and brought it home the valve cover gaskets were leaking so I removed the covers and noticed the 340 had adjustable rockers. I quickly took a few pictures of them but didn’t think anything more about them. I was just looking at the pictures and I noticed that they look...

Since I have NO idea or clue what cam is in my 340, and if I have to take it apart just to determine what it is, I might as well think about making a cam change. The motor has X heads and adjustable rocker arms, look like the 273 hp cast iron units. I don’t know if the current cam is hydraulic...

I removed the valve covers from my new to me 340 and I can see that it’s not stock. Can someone identify what I have here and what I need to know about it. Thanks

I purchased a 69 Swinger recently Last weekend I started checking the block out with the help from some of the members here and I found that the Casting number 2780930-340-8: = 68-73yr Casting date is 7*70 this had me thinking wrong year motor, but not sure if it could have been a replacement...

I purchased a 69 swinger 340. I hope that this doesn’t sound too stupid to you but I am trying to drive myself crazy sometimes when I should leave everything as it is….. I am trying to read as much information about the 340 so I have a better understanding on what works and what doesn’t work...

I’m in my 70’s and I am not going to the track anymore I am just looking at driving around and cruising to the shows. I just picked up a 69 340 swinger, first time I ever owned a 340, always had Big Blocks for the last 55yrs. The owner of this car passed away and I don’t know any history of it...