[bryce6horse]

My 86 K20 350/TH400 had the 4 core radiator in it. I was having some issues with the truck running warmer than it should have been. pulled the radiator and it was all plugged up at the core tube ends. I found the original replacement but did some research and decided to go with an aluminum radiator. the replacement Spectra told me was a single core. I told them there was no way going from a 4 core to a single core was going to keep me engine cool and i told them also that i pull a 5th wheel camper with the truck, have working a/c condenser and tranny cooler. I have to say I have not had a cooling issue yet. I was very surprised.