TE-570 vs TE-610 cilinder head fit

Does anyone know if i can put a cilinder head from a pre 2000 TE-610 on a 2002 TE-570.

Why do i want that?

Well first, i am not a rich man, i just cant buy and buy and buy and buy like there is no tomorrow.

Second, a series of problems.

What Happen?

I have a 2002 TE-570 enige and build it into a motocross sidecar. The engine has the infamous Mikuni TNR??? I forgot te name and type, i am not close to the bike, i cant take a look now. But it is the infamous Japanse build carburator that is known for its brutal power delivery, yet a pain in the rear-end to get the settings properly.

To make it worse, the engine is tuned. It was like that when i bought it and frankly, i did not noticed this before i took the engine out the donor TE-570, motocross version. How do i know it is tuned?

1: the intake is 44mm, not 41mm.
2: the intake is clearly machined as it look different then the standard casting.
3: there is a small tuner logo/marking on the cilinder.

The problems:

1: the complete bike has been with the dealer for a while
2: the previous owner is forgotten / unknown
3: the tuner does not exist anymore. Literally.

What does the engine?

1: spark is perfect
2: timing is perfect
3: will start and run for about 5 or 6 cycles and then stop
4: every change in carburetor settings will result in doing nothing at all.

My problem:

Those pumps on the carburetor, power pumps, how do you call them? is a new technique for me, i am unknown whit this carburetors as they did not exist in my young years of motorcross and rally. (57 now)

What is want to try is is this:

I have a 2000 TE-610 supermoto with licence plate which runs fine. I have a second carburetor for it. A Dellorto PHM 41. I want to put a TE-610 cilinder head, a complete standard setup with all the valves and camshaft on the TE-570 engine and use that Dellorto carburetor. Then i can just copy the settings and jets from the supermoto. I want the sidecar to run.

1995 - 2000 used engine parts in very good usable condition are good available in the Netherlands, and for nice prices. This in contrary to an original and standard TE-570 cilinder head. There have not been much TE-570's on the marked here, but a lot of TE-610's.

Like i said before, there is no budget to keep buying carburators or complete engines. And even when, i still would do it this way. This engine must be able to run. On dutch fora i can't get an answer. I dislike dutch fora anyway. It's always the same story there, "you should have bought this or that". "Should" is history and nobody can turn back time. After 4 or 5 posts someone comes to insult you under the name of "just a joke" and the whole thing goes off topic to never return on topic again.

Short: can i use a TE-610 cilinder head, full standard setup, on my TE-560 engine?

Yes I think you can. Ben Van ERP in Markelo would definitely know. Just be sure to use a kickstart only model head.