[quote=shaker340]Can anyone confirm the comment about 340 26 inch Radiator lower inlet being smaller than would be on a big block 26 inch radiator? I am using a 340 rad and the lower hose is same diameter from water pump to the lower inlet.

I am working thru a 440 running too warm according to my gages which I am trying to confirm their accuracy. Mine is doing 220 highway and 230 idling.

Inlet outlet are same size 26" 340-440 rad 70 and up. I measured a 2998949, 3673925 both smallblocks, and 2998956,3443959,3443960,bigblock all 1.5 top 1.75 lower only thing changes is hose location. Those temps sound like radiator or gauge to me. I drove 900 miles with no fan, clutch failed so I removed it, home from mopar nats august, hot out, air on, and my 440 ran 180. But my block was is standard bore, original radiator.