Magnum head swap compression increase

I came at it from the other end;
the LA360s were advertised at 8/1 which requires a total chamber volume of~105cc;
(737.2+105)/105= 8.02cr
Assuming a 9cc gain, the total chamber volume drops to 96 and the Scr rises to;
(737.2+96)/96=8.68..... with no other changes.
Is it worth it?
Oh yes, those Magnum heads have other perks that the LA 360 might like.
And make sure you install the cam from zero advance to plus 4 degrees. Up to Plus 8* if you don't mind sacrificing some fuel economy, to get some pressure happening.