I was wondering if anyone knows of any models that interchange with mine.
I have a 1991 740 2.3l non-turbo.

And can I use a cluster from a turbo model?

some clusters I came across:
'88 760 turbo
'95 940 non-turbo(9434021 part no.?)

 

pretty sure the 88 760 has a completely different dashboard.

91-92 940 and 740 are essentially identical except the front grill/headlights, and the tail of a sedan.

a turbo dash will have a turbo boost gauge, you can just ignore that on a non-turbo.

91-92 used that awful yazuki(?) speedo which is prone to electronic issues. sadly, the gas gauges are different as the gas sender resistance changed, or something.

my PC crashed yesterday, so until I can rebuild it, I've lost all access to my wiring diagrams and parts catalogs.

 

Here ya go:

https://www.volvoclub.org.uk/faq/Ele...ngeability.htm

and notice that if you change the gas gauge or the sending unit in the tank, there's more interchangeability.