I'm hooking up my stock deluxe heater in my '57 with an LS 5.3 engine. Where do I route supply the hose from the engine to feed the heater assembly? I would guess the valve, but so many times in this project I've guessed wrong. I know which tube on the motor's water pump is the "outie" & how the hoses are routed between the valve & heater core but am not sure which hose goes where. Thanks.
I looked at that page in the 1957 assembly manual section of the library earlier today. I think it indicated that the water flowed from the pump to the upper tube of the heater core, which is counter intuitive. I would have thought it would flow to the valve & from there to the core. That being said, I found out the the rear tube on the LS's water pump is the outlet so I went ahead & hooked it up to the upper tube of the core as per the drawing. I'll find out tomorrow if I'm right. Thanks for the link, David.