318 crank pulley correct size??

Here are two sources for what you are looking for:

main pulley page:

Products: Pulleys - Bouchillon Performance Engineering

Pulleys


crank pulley main page:

Products: Crankshaft Pulleys - Bouchillon Performance Engineering

Crankshaft Pulley


crank pulley that you need:

BPE Double-Groove Crankshaft Pulley - Bouchillon Performance Engineering

Crankshaft Pulley with Power Steering w/o AC


water pump pulley main page:

Products: Water Pump Pulleys - Bouchillon Performance Engineering

Water Pump Pulley


water pump pulley that you need:

BPE Water Pump Pulley - Bouchillon Performance Engineering

Water Pump Pulley w/o AC