The performance of the car improved enough so that the dyno power numbers at least make some sense now.

If you have faith in the dyno numbers, and the car doesn’t run like it should....... you know where not to spend the time and effort trying to get it sorted out.

You said the car now has a data logger...... what does the a/f ratio look like going down the track?

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads