Those bikes have era correct parts.
Parts no less you added BITD.
It doesn't get much better than that unless you are attempting to build a "catalogue" bike.
Many of these bikes were built from a F/F set not bought as a complete.
If I were you I would leave them completely together until you start and finish rebuilding them and then you will not lose any parts.
Certain parts you do not want to lose.
For example the cranks ... the bolt which attaches the sprocket to the arm.
Those are factory button head bolts which are hard to find.
The closest style of bolt to those will still hit the BB cups so only a button head bolt will work properly.
Keep that Redline what ever you do.
By far it's a very nice survivor piece.
Original paint & declas on the F/F & Redline cranks. Plus Peregrine mags.
It doesn't get much better than that.