Timing chain for a hencho Mexico good wrench engine

[Morgan72]

Hello all,
Got a good wrench replacement engine in 72 gmc and need to replace the timing chain but can't say its a 72 350 engine. The casting number is 10066036 its a made in Mexico engine. In research it says it was made in 94 but all the trucks at that point had differences from earlier engines. So my question is has anyone replaced a timing chain in one of these engines and have the brand and part number they used?

Thanks for the info
Shaun