Still loss of power.. what next please?

1982 109 2.25 petrol

Recently fitted unleaded head.
New head gasket
New fuel pump (AC)
New filter
Correct torque settings
New Bosch plugs
New Webber carb
Professionally tuned
Professionally timed
Have just pressure tested each cylinder 7.9 BAR 109 PSI throughout
Runs very sweetly
BUT
Gutless, Struggles to get to 45 mph
Brakes not binding
No sign of sediment in tank
No sign of air in system
Any ideas greatfully received. Make them witty I need cheering up

Thanks

Old Bloke

ditch the crappy bosch plugs and fit a set of NGKs.
It's a long time since I had a petrol series, but I remember that problem.

i think your answer may lie wiff your choice of person to do yer timing and tuning ( is there a difference)Professionally .

how much eggspeareence do they have wiff series injuns?