763:
I know the Classic quite well and doing the reverse of your program: Going from the classic to the 767.
(Man, do I miss the 747 now....)
Having flow classics for 3 different companies over the last 12 years, I have yet to see an FMC. As mentioned above, probably a PMS, but aye, ya don't need it.
Get used to pushing buttons to program the INS boxes. Especially the 9 way-point ones.
The Litton 92s are better, but not quite up to the modern magic boxes.
The classic drives like a big Caddilac, and seem slow because of the size, but it ain't.
Be careful taxi'ing, lots of wingtips and wheels out there.
Enjoy.
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Men, this is no drill...