71 Dodge Dart Swinger in England

Ok still running rough anything above idle, feels like cylinder(s) missing.

whats Ive done so far

Stripped and rebuilt carb - floats reset 7/16 closed 1" open
stripped and rebuilt dizzy air gap 0.08 thou
new plug leads, plugs, rotor arm, dizzy cap
timing set and rechecked many times at 8 BTDC at 800 rpm (ish) Played around this mark with engine running to find sweet spot, vac re connected
ignition box earth cleaned and checked
firing order checked many times
all cylinders 155 PSI

any other ideas?? I might try another coil to test/eliminate that