My doomed 408 build

Cal Tonsley said

I think you’ll find that the 5845 is actually a double with damper spring, I’ve measured them previously and the way they come setup from Edelbrock they have approx 150 lbs seat pressure at about 1.85” installed height

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Thank you... you are 100% correct! I looked in the on-line catalog and missed the inner spring. And it makes more sense to be a dual at that rate.

So the OP CAN tell if the springs he now has are for the rollers or not by the presence of the inner spring or not. Thanks again Cal.