Doesn't make much vacuum with that cam, but have a 4 hole spacer to help the signal out (maybe I'll give a tapered spacer a shot), drivability is no worse than my mild high 12 sec small block Dart.

The 500" motors make so much bottom end, I don't think a dual plane is really needed.

The off the shelf 10" 3k converter flashed to north of 4k, the Dynamic 9.5 is about the same, so low speed drivability was never really an issue. Normally run 3.55's, a 30" tire and it's a somewhat heavy car...