you'll need..
1/2" breaker bar
14mm socket
locktite
grease
hammer
large screwdriver
Take the 1600 manual motor and undo the flywheel bolts with the breaker bar & 14mm socket. You'll need to slot the large screwdriver through you front pulley so it jams againt the block. This stops your flywheel from moving

Then you'll need to get the spigot bearing out of the crank end. Pack the hole FULL of grease (thicker the better) and make sure there's no air pockets. Get a socket that
just fits inside the hole, put it on a short extension bar and hit it firmly with a hammer. The pressure on the grease will force out the bearing. It might take a few hits.
Then remove your washer, driveplate and spacer off the 1300 and transfer them onto the 1600 crank end in the same order. Use some locktite on the driveplate bolts and do em up tight with the breaker bar/14mm socket. Job done