[SEL] round belting for water pump

[bill boyce]

i;m looking for some round belting info,,,, there is a 7 inch dia. by 1/2 inch round belt grove cast into the inside hub of one of the flywheels on my stover 22, from which i plan to drive a water pump . i;ve never used round belting, so i need some guidance here..... what is the best material for this application ? how do you splice it ?  where can i buy it by the foot ? i plan on using a gear pump that has 3/4 inch pipe thread inlet and outlet, with a 5/8 inch shaft,,, how small of a pulley can be used with the 1/2 inch belt ? will the 7 inch drive turn the 2 or 3 inch driven pulley fast enough to move enough water to cool the engine? its a throttler that gets pretty warm, but only runs at about 80 or 90 rpm , so thats going to turn the pump only about 200 or so rpm,,,i dont have any stats on the pump output,,,,,,,,,
any ideas will be appreciated,,
bill boyce
lost prairie, arkansas