392 or 345 Hemi?Do both fit and A Body engine bay the same?

Found out that Pace performance dropped their 460HP 345 Crate Hemi and that Johnny at Pace Performance is also gone. Had been planning on the PP 5.7 crate Hemi but now need a new plan.
Wondering if the 345 and 392 Mopar Performance crate Hemis both fit a 69 A-Body engine bay the same?
Do they use the same exhaust manifolds/headers, starter, radiator, motor mounts?
What's not the same, as far as fitting into the engine bay?