Suburban 12 Mower deck Model # help

Hi all,

Does anyone know if there is a physical difference between 42" mower model #917.253150 (my deck) and a 42" mower model # 917.253250? Looking for replacement blades and found a set for model # 917.253250 but was wondering if they will fit my mower. All the measurements of the blades posted on the website seem to match mine exactly but wanted to make sure I wasn't missing something.

The mower is on a '68 model Suburban 12 (Orange/White) that I picked up back in May and finally got running. Had to borrow the SSI and transformer out of our original '68 Suburban 12 that was retired due to engine problems (possible engine conversion in the works for this one). The new one seems to run very well, still in need of some tlc but atleast its operational now .

Any help much appreciated.

Thanks
Brian C.
Pittsburgh, PA