I dug into the earlier parts catalog (83-86) and found that up to VIN 244542, the power steering pump is part no. 610020. I looked under the bonnet, and that is indeed what I have now.
So, those of you that have early V8 ROW trucks, can you use ANR2003 or NTC9198 in place of 610020? If so, is one any better than the other? And finally, is it preferable to buy new or rebuilt (Meridian)? I appreciate any info you guys can provide.