Thanks for that Alan.Ya mite get a kick out the performance that day with the 520.11.52 @ 117 ,7.35 @ 92 half track,with a Performer RPM manifold and a 780 3310.The 3.50 gear and lack of a good carb laid it into the converter and was at 5400 rpm all the way down track.Just thought it would be fun to try this horrible combo...lol.