I have used the 235 radiator in many SB and BB conversions. The important thing is for the radiator to be in good shape. None of my conversions ever had a heating problem. I live in SoCal where we have weeks of 100 plus weather in the summer. The original V8 setup in the TF trucks had the radiator spaced to the rear with a shroud from the core support. I have run these conversions without a fan shroud without problems.