Technical Cadillac 390 heads on a 365

Hi All,
This is my first post so i hope I am aligned with all forum rules.
I have read extensively on interchange of 331-365-390 parts and conclusion is that it would be no problem putting heads, rockers and intake from a 390 on a 365. But i am not sure about lifters and push rods. Apparently there was a design change in 57, and the conclusion on that is that a 56 can run with 57 lifters as long as 57 push rods are used. this indicates to me that the overall length is the same. and the -57 lifter design continued into -62. Is it correct of me to assume that from -56 to -62 either the earlier or later design of lifters and rods can be used as long as one don't mix early lifters with later rods or vice versa?
/Martin

 

Why not put the heads, rockers and intake from a 390 on a 390?

 

Maybe he has a 365 w/o heads and has a line on 390 heads.

 

IIRC this has been covered in the past so someone should chime in.

 

@Pete uses early Cadillac engines but I don't know how often he gets on here anymore. He is
East coast speed on insta

 

That is exactly the case.
Bought a 1956 convertible where the previous owner started to tear down the engine and heads were lost. 365 heads are hard to find especially in Sweden, But i was able to get a pair of 390 heads+ intake + rockers. I have the valve covers and original lifters and rods. I think they should work but wanted to verify with the knowledgeable people here...
And as long as i am not going stock original i think i will put an Edelbrock 1406 on top of it all

 

you will need to use 390 push rods. They are a slightly different length.