Alternator
Alternator mounted, I used a straightedge to line up the front pulley face with the crankshaft pulley - I'll double check when the engine actually turns over that its all aligned. It was easiest to take off the plenum & intake manifold adaptor to get at the alternator bolts:
Belt in place - possibly a little slack for now:
The star on the crank end bolt & the masking tape on the chassis rail were markers to align the engine.
Update - I should have cleaned off a little of the powder coat on the mounting brackets to ensure a good earth for the alternator. Remediated later with another earth line on the intake side of the engine.
Steering column
The steering column came out to drill the engine mounts - so now back in with the correct steering rack bolt which locks the column in place; it can't pull off the rack spline even if the nut came loose. Centred the rack beforehand.