I did mine last year, didnt have time to try to rejet but i ran my fastest in sig below in hot weather, picked up close to a tenth and 1 mph, heres pic

6446974-airpan.jpg (1981 downloads)

footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105