Frame Id Help

Hello, just got these two frames the seller sayd it was a 250 cr (the one with wheels)
He also said he had complete engine exhaust etc but when i came for it ha had lost the rest
But he had another frame he gave me. Paid 100$ for them
So for my question the wheeled frame is coded ML 26483 to my understandig this is a 78 125 but i may have wrong?
The next one i cant find any number on, but they ar clearly different.
I hoping some skilled guys here may see what it is?
Witch of these should i build up, I am planning to ride it and have a great time on the track
Thank

The ML frame is a 78 but there is no way to know what size it was, Husky did not give distinct frame numbers to the different size engines. The other is a '79, looks like a WR.

If the 78 frame has tapered stem bearings then it would be a 250 or 390. If the stem has ball bearings then it would be a 390amx or 125CR.

Marty