/6 questions

Just throwing this out there but I need good advise. I bought a 1950 International L-150. 1 1/2 ton truck.I'm in the process of fixing it up. I want to replace the SD 220 six in it with a six I can get parts for. I'm thinking of the 225 /6 maybe. Sixes fit best to fit around steering box. I'd rather use Mopar then Ford or Chevy. Has anyone done anything with an old International. Let me know your thoughts.
Thanks
Zigs
Just by chance, my brother in law has a neighbor with a very cherry 1950 IH, this truck would be museum quality, if there was a museum for such things,,,

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