Hoping for some guidance with radiator hoses

[enroberts]

Hey there. Hoping for some guidance. I've got a 4.8 in my '64 junkyard build and I bought an eBay radiator for a '64 (another site recommended this rad for a cheap build). The 4.8 has the stock water pump on it (from a '99 Silverado). You can see from the pictures the inlet and outlet on the radiator are about 1 3/4" diameter. The water pump outlet is about 1.25" and the pump inlet is about 1.5". Does anyone have suggestions on which hoses I might be able to use? Thanks!