'71 SJ vs SS radiator

Discussion in 'The "Paper Trail"' started by dynaflow, Jun 21, 2019.

  1. dynaflow

    dynaflow shiftless...

    Clearly my 455 auto A/C has a replacement radiator...no tag, no embossed ID that I can see with rad in place...no help there.

    Read every thread I could find and digested chart on assy manual page 11-4.3. SJ was go-to rad for my config until 10-26-70 page revision added the SS with a different part#. Since mine is an 05B build, I would have gotten the SS.

    Per thread research, both SJ and SS use IA and CF tanks, so my question is...what's different causing Buick to add another rad with different part#/code? Only thing left is core. Anyone know what Harrison was doing then with core technology that would've replaced the SJ...?
  2. Duane

    Duane Member

    There were like 3 different radiator Code Letters for Radiators with the IA & CF tanks, and the only differences were the cores.

    I do not remember if I have ALL the info regarding the different core thicknesses for the 3, but do know the one size core was for a 350-4-bbl non-AC, as it was the original radiator for my old 71 350 GSX.........and if memory serves me correct it was a 2-core. (But don't quote me on that.)
  3. 1972 Stage 1

    1972 Stage 1 Well-Known Member


    Here is an original SS tag if it will help in any way.

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