I checked on the cranks and chain rings.
The cranks have the Raleigh stamp on them and the chains have 40 and 52 stamped into them. I noticed that the 75 Raleigh had a Raleigh crank option (40/90). Also, the cranks have "201 ND 66" stamped in them.
Is it fruitless to continue trying to date this bike if I am going to put the original spindle and cranks back on? I don't want to put too much money in this bike. I'd rather get myself comfortable with putting a bike back together.

Thanks for your continued help.

PS - How do I check the rear triangle alignment?