PLEASE help! 360 vs 273 oil pans different?

crackedback said
There is a spacer available for the rear oil pan seal to use a 273-340 pan on a 360.

Another potential option.

I don't think that would work?? 360 have larger radius on the pan and 273-340 is smaller... you could put a spacer on a 360 pan to use on other small blocks but not 360 with a spacer to use 273-340 pan