340 Valve springs

[Dean N]

My ("new") engine has been sitting for ~30 years, so I pulled a couple springs (singles with dampeners) and tested them, one that had been compressed all this time and one that had not. Installed height measured at ~1.687, and the uncompressed spring tested out to ~290# at 1.180 (0.507 lift). I don't know what the cam is, but it has ~0.468I/0.507E total lift. Durations could not be checked at this time, but that wouldn't matter on the springs anyhow.

It appears the springs that were in it were Mopar P5249847s, which now seems to be unobtanium and quite potentially discontinued. The popular Comp 901s bind at 1.160, so I can't use those. Now what?

EDIT: I am seeing differing data on the 901 bind height. Still looking...

[Dean N]

Possibly Comp 942, but I'll need different retainers.

[Matt13]

Following this as I'm in the same boat.

[Chryco Psycho]

Newsflash - Comp is NOT the only Cam company
Check with 100 other mfg
If you have to change the retainers I would be using Beehive springs the technology is far better & I would use 10* locks .

[Dean N]

Comp 942, Lunati 73126, and Crane 99839 are contenders.

Chryco Psycho, can you direct me to some beehive or conical manufacturers' pages to peruse?  I look on vendors' pages and it is impossible to see which link to click, and I am not up to clicking hundreds of pages!

[Chryco Psycho]

I was looking into it about a month back , I will look at it again for you .
Try Calling Lunati Tech they are very helpful , I am sure I was looking on their site , the beehive helps with clearance for the rockers as it is close on the LA engines .

[Dean N]

I'll possibly call them this week. Time crunch this week.