Magnum timing chain with LA timing cover, and fuel pump eccentric

JoePole1 said

With what engine and what chain set? I have hears tensioners and double rollers don't play nicely together.

Was looking to use the Edelbrock true roller 7803 timing gear set on my Magnum 360 but I read in the description on the JEGS website that it is not to be used with hydraulic lifters. No mention on Summit or Edelbrock sites so I called Edelbrock Tech support and they said it will NOT work on Magnum due to clearance issues with the upper sprocket. They recommended a Cloyes unit. Now if someone wants to dispute this with real world results I would still like to use the Edelbrock set.

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1970 340 motor. JP performance chain and billet gears w/9 way adjustability. I had heard good things about them, but...
It stretched, in short time.. I found that out during a refresh...which is why I added the tensioner. The low-mileage on it, the quality gears, n price of a billet gear set..it didn't warrant changing the chain set yet, tensioner was cheaper and I had wanted to try it out.
I think it's a wear issue. The double roller will cut into the guide material over time.
It did, a little, but I'm still using it in that motor.
I do wanna give you recommendation 9n chain sets though, and that's to use a billet mancini racing set. I use one with my 410, it's not stretching like the JP. The JP has a "rollon" chain ..and I believe the mancini chain is either better American or a better Japanese motorcycle chain manufacturer , since its known they have made timing chains for our stuff.