You can use a two-leg puller on the slotted wheel (1973 models up to July 73), maybe on the previous wheel with the 'finger-trapping' holes, less likely if at all on earlier and later wheels. But even though this wheel has been off several times I was surprised how many turns of the bolt were needed to crack the taper.
Swapping the mid-era wheel like-for-like you can simply undo the six bolts under the horn-push (Ray Longsheds)
Some buckling, possibly due to the push-pull method of removal in the past (Ray Longsheds)
What lies under the foam/faux-leather covering (DIY Wood Steering Wheel)