News:
I don't show a 3443971 on my big list of radiators, Google turned up thishttp://books.google.com/books?id=-Nq_KTNYEEEC&pg=PA44&lpg=PA44&dq=radiator++3443971&source=bl&ots=HgPJe-_DSr&sig=jrFyHVuidzk75B2RSIAESUA5L4Y&hl=en&ei=xk25Sq6MCpuwtgf-jPT0Dg&sa=X&oi=book_result&ct=result&resnum=2#v=onepage&q=radiator%20%203443971&f=falseMy list shows2998974 1970 B 26 318 BOTH A/CIt appears that they are both used on 318 models with A/C, so if both are 26" there should be no issues using with any small block.