I believe the cranks are Cook Bros Racing (CRB) from early 90s. I flipped a set I found on a similar condition Klein I found at a GW out in the sticks.

I like the lugged fork dropouts.... and pieced together headset. That seatcluster is close to some Japanese Novaras I've seen, but they had a different canti brace as I recall. Are those Suntour Butterfly shifters without their plastic trim?