A 1275 block (non S) and caps, std bore- probably worth $300-400.
Cranks- it depends on sizes they are now. Measure them. Get them cracktested too, as many now have cracks in.
Pistons if S/H are worth zip really.
A 4 synchro box is the same whether it has a 1275 on it or a 998-1098. 1275 will drop straight on and clear. Just use a 1275 primary gear.
This applies whether it's a remote, or rodchange.
Many 3 synchro boxes need a bit of a grind to clear the crank, but the real early ones (850)- forget it.
These days for ease of use on the road and parts availability I would forget any 3 synchro box, anyway.
