ISO Valve Springs for aftermarket cam. BTR or equivalent
 

Looking for BTR 660s or equivalent for around 600 lift cam. Preferably with retainers

Bump.

I have some .660 lift comp. They have maybe 4k miles on them. No hardware though. The heads were taken off for ported heads. Owner sold the heads and hardware. Buyer had new springs.

Without hardware it's probably cheaper to just buy a new kit. What do you want for them?

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I have a new set of PSI 1511 springs that are good for 675 lift. Fit stock retainers and platforms. I have new in bag factory retainers, keepers and spring platform/stem seals.
$145 for all plus shipping
You can check out the spring details on PSI website

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