Vacuum Pump Questions?

i like to hear about this myself ..as i am thinking of getting a pump for my motor...
451/400 base
eagle h beams
eagle 4340 crank
j e pistons (dome) about 14.1 comp
cam motion roller
t&d rockers 1.6
rbre mains
all studs head and main
-1 heads with 2.25 valve /1.81
400-2 intake
hope to get a 1050/1150 dominator on top with the 2" spacer


whats the specs of that 500 9 sec. motor...:happy2: