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Strange issue came up this year. 340 is running great but when I get on it to 6k in first and second I then go to 3rd still at full throttle but at 5k rpm it falls flat. I noticed this once last fall but it went away. Anyways any thoughts? 69 340 4 speed w/ 3.23 gears Lunati 60403 with Hughes...

Had my dad take the car out for a few passes. Very pleased with the cam so far....... 1971 Plymouth Duster 340 - YouTube Plymouth Duster 340 - YouTube Plymouth Duster 340 - YouTube

Has anyone used these pushrods? Comp Cam 7821-16 In the item description they are sold as LA 273-360 "Hydraulic Lifters w/Adjustable Rocker Arms" Any input will help. These would be used on a 1970 340 w/ stock J heads using 273 adjustable rockers. Lunati cam w/ hydraulic lifters Comp Cams...

Ordered this cam on Friday afternoon and it was on my doorstep Saturday morning. Not to bad. Starting to get all the parts needed for the cam/valvetrane upgrade. Hope this helps the 340 wake up a bit more.

Who makes multi-groove keepers other than Mopar Performance? When selecting valve springs and retainers they are typically a 7 degree retainer. The only keepers I can find for this are single groove at this particular 7 degree. MP makes the different groove ones but they are all 8 degree...

One last question. Would it be an option to use the Lunati Voodoo 60403 cam with Hughes 1110 single valve springs? It looks like the hughes springs are recomended for similar spec Hughes cams but I want to make positive its a good option. I am hoping to stick with a single spring but if this...

I have a 1970 340 with the stock 10.5-1 compression pistons. Who all has this same motor and what is the maximum lift cam that can be used before valve-to-piston cleaence becomes and issue? Im by no means looking at going with a radical cam but I would like to know what range I need to stay...

Hey everyone. I just want to verify when using the 273 adjustable rockers on a 340, I have to use the 340 T/A pushrods due to being a hydrolic lifter but mechanical rockers. Please correct me if im wrong. Also where can I get the spacers for the rocker arms? I will be using the shaft...

I was looking at the Lunati cam for a future upgrade but it looks very similar to my existing Purple Shaft cam. Only noticable difference is the intake/exhaust lift Take a look at the following spec and let me know if this is even a worth while upgrade. Thanks Lunati spec on the left vs Purple...

What brand of roller tip rocker arms are you guys using? I am getting my spring time list together and hope to get everything picked out soon. Any recommendations/horror stories with particular brands? Thanks

Has anyone used rocker arms from KMJ performance. On ebay they have a set of roller rockers, rocker shaft, hold downs with bolts for $335. It looks like a decent setup but wanted to get opinions first before I go any farther. If you dont likie these/havnt used them, please give some...

Has everyone that has used this intake had good luck with the ports matching right up. I have heard horry stories on the off-brand copies of this intake about the gaskets and ports being way off. Any input/pointers requarding this intake would be great. I typically use Fel-Pro gaskets as well...

What is the maximum lift that you can achieve with a 340 J head 2.02 valves before you run into clearence issues with the valve guides??? I have heard that .450 lift is the max before you have to grind them down.

Hey everyone. I am looking for some insight on installing this cam (60403) into my 340. This cam was recommended for my setup and really would like to use this cam for my car. My question is what exactly is required to purchase aftermarket for my valvetrane. If I buy the matched lifters and...

Has anyone used this cam. Im looking for how your car ran with it. Rough or smooth idle, good RPM range (actual street feel), and if you needed to change the valve springs along with it. I already have the stock double springs on my 340.

I have been reading up on the great reviews for the extreme energy comp cams. Currently I have the Purple Shaft .450, .455 lift which runs great. My goal is to get me car into the high 12's after some tuning. But after reading about the XE cams it sounds like you can get away with a more...