Always appreciate the feedback Jerry. Our convo is continued in the PM's
Further observation from this morning with fresh eyes:
Given the difference in thickness of the fingers of the weights, it looks like the 292 points weights would allow a higher centrifugal travel when placed on the HEI vs the 250 weights, thus, a higher advance at the top end. Further inspection shows that the weights are spaced closer to the axis of rotation on the points dizzy and further from the axis of rotation on the HEI dizzy. Change in distance (further out) from the axis of rotation would mean that the 292 weights would allow advance quicker (the further from axis of rotation, the higher the centrifugal forces) on the HEI than they would on the points dizzy, assuming the same springs are used. Quicker is the opposite of what I am looking for however.
All of this to conclude: I assume that the weights between points dizzy and HEI dizzy are not necessarily compatible with each other, at least in unmodified form.
I am yet to find any info on actual mass of 292 HEI weights vs 250 HEI weights and if they do indeed differ or if it is purely the springs between the configurations that differ. The 250 HEI weights are labeled/engraved "60" for whatever that may mean. I also cannot find any data on the difference between L6 and V8 weights and compatibility. They look the same, but no-one can verify weight mass and it is my understanding (could be wrong) that OEM had different weights for different applications. V8 and L6, for lack of a better explanation, are very different.
Like many things, I could simply be over complicating a non-complex system. Use the 250 weights, put on heavy springs, and roll. Given its not a race car or dragster, I guarantee I wouldn't notice anything out of the ordinary, excluding pinging of course.