HEMI differences

Rainy Day Auto said
I have a 3 year plan to get a HEMI into my 68 coronet to replace the 440 and I see Jegs and summit have the crate HEMIs

my question is: what is the difference between the 426, 472, and 528 as far as dimensions ......do they all interchange stuff like valve covers intake manifolds and items as such??

Motor mounts: Are there mounts available to bolt up to a 440 K-frame?

flywheel: do the crate motors take the standard 6 bolt flywheel??

Anyone have experience with the mopar performance HEMI engines?

Don't forget, there was a ton of gusseting and reinforcement to to all factory Hemi cars.

When lying under my 68 Hemi Road Runner you can see the extra reinforcement that was not included on my 1969 44O GTX.

Same trans, same rear end, just more reinforcement at chassis stress points. I'm sure those crate hemis are pumping out more torque than my factory stock 68 426 was.