allways,I run a stock one for a HD truck on both of mine

like said,if used be sure to flush them good

got a PS cooler and an oil cooler on mine

tranz cooler is stock 85 truck unit,ps cooler is from a 93 DAK v-8,oil cooler is from a 88 police gran fury

have a 7 blade fan and a 3 core rad

all on my 85 truck