Chrysler 1926 G70 Engine vs 1927 70 engine - interchange ability ?

[cricketkj26]

Are there any differences between a 1926 G70 engine and a 1927  70 engine ?  Same internal parts ? 

Concept Cars website shows 1927 70 engine as 288.6 cu.in.   ???   Is that correct ?  The G70 is 218.5 cu.in.

and they show the 1928 72 as 249.7cu.in. ??   Thanks, Cricket KJ26

[viv w]

Damman's book 70 years of Chrysler says the 26 G70 motor and the 1927 Finer 70 used the same motors and all motor numbers started with G******.  The parts book also shows all parts for the G series engines were the same.