Edelbrock heads question

You know what;that sounds right.
I found specs on the springs.

the 5767s are 1.460 od by 1.060id, and
the 5845s are 1.460 od by 0.965id
So the wire diameters are the difference. By math
the 5767s are 0.200 diameter, and
the 5845s are 0.248 diameter
I'm guessing 3/16 and 1/4 inch

Therefore, measure your wires, and then you know which springs you have, and that tells you which assy you should have.