trying to be Cool

im in need of a radiator for my 75 swb I have a big block in it now and its not wanting to be very cool any help with ideas? thanks
Darrill

I run the 440 in my 88 truck with a alum/plastic replacement rad for a 85 D150 5.2/318 with no cooling issues.

it is a single row core but it has the big wide tubes.

I also used the HD MAX cooling 78 440 non a/c thermo clutch with a 7 blade fan.

they also have a larger/taller brass/copper 4 row rad for the mid 70s/80s 3/4 - 1 ton trucks.

same width but taller/thicker/ uses the larger metal fan shroud.

I have a new one in storage just in case this cheap replacement ever lets go.