Originally Posted By: mshaw230
Mdonahue05 and panic,
Where might I find the specs for the distributor I'm using and for the original?


I've never seen a reference book with such data compiled for comparison. Not even the shop manual gets into this level of detail.

Based on what I have seen online and at swap meets - there were the occasional publication of supplements to shop manuals when extensive changes were made during milestone years - Bendix brakes, power-glide etc.

6 to 12 volt was a major move affecting dizzies and wiring harness, tuning specs/procedure - 55 Caddy Shop Manual Supplement.

In this case they went to the trouble to share the advance curve data. Why is somewhat puzzling because this information is not needed for a flat-rate tune up. It's internal engineering.