Engine: D5: Broken cambelt

[pyroloxley]

Hi all. Been a member for several yrs but never posted - only read with interest.
I have a v70 d5 on a 52 plate with 135k on it. Cambelt changed at around 85 - 90k just after I purchased 8 yrs ago. Cambelt let go last week - all pulleys tensioners etc seem in good condition, not seized loose or wobbly and free turning, but it was just a cheap belt from local motor factors (bought in a rush).
Broke most of camshaft bearing caps and two hydraulic cavities. So need to get replacement head or engine. This is obviously the 163bhp motor, question is will a bare engine 185 motor fit and run with all the 163 auxiliaries, if so any advantage. Any preferences with just changing head or bare motor, bare motors appear cheaper than heads on flyby, but how do you know there 'good' before all the work of changing. Alternative is to weigh in perhaps selling fairly recent turbo, new tyres and battery and fuel pump + injectors first.
Thanks in anticipation of any replies / tips