Suley;

http://www.speedwaymotors.com/Stewart-Components-32203-Stage-3-Small-Block-Chevy-Water-Pump-Short,1815.html This is a link to Speedway Motors, who sells Stewart water pumps. Their Stage 3 is the highest performance pump that they make-- expensive but worth it. Be sure to look at the links on that page for further information about "long" and "short" Chevy water pumps.

http://www.edelbrock.com/automotive/mc/water-pumps/ This is an Edelrock page wih a worthwhile video about their water pumps. These aren't cheap either.

http://www.summitracing.com/parts/ed...make/chevrolet Edelbrock pump from Summitt

http://www.jegs.com/i/Edelbrock/350/8810/10002/-1 Edelbrock pump from Jeg's.

A high- flow thermostat should be used and the rest of the cooling system should be in good shape. Back- flushing the radiator would be a good idea, too.