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Summit has the spec'ed spring P5249464. Going to just get one to patch this thing up. Thanks for the tips. If I have any more spring problems I will just replace them all. This motor doesn't have any miles on it, hoping it was just a fluke that the spring broke.

Poor motor is coughing and sputtering. Problem started over a month ago. On a Thursday night test and tune, last run of the night during a burn out, the motor back fired. Should of known them but I ran it anyways and it coughed and sputtered down the eight mile. I had been having some ignition...

Lol.. I didn't check it before disassembly so now I was just wondering if the factory builder of these engines installed them straight up, advanced, retarded, or if they just lined up the dots.

I have a 360/390 magnum motor I bought used it was never ran but it had some water damage so I had to take it apart and clean up some rusty parts and reassemble. It has the 288/292 duration .501/.513 lift hydraulic roller cam 108 centerline. It's been awhile since I put it back together but...

Damn cool re-powering project! Making good progress with a well laid out plan. I like it.