Cross flow going like a pig

[Mikes mk2]

Hi my 1.3 xflow is going really bad. It misses and you would think going on 3 cylinders when I accelerate particularly at 20 -40 mph bracket . I had points,condenser and rotar arm changed and it makes little or no difference. Plug leads etc are all good any body any ideas ? Should I change whole dizzie r
to electronic?
Help
Thanks 👍

[Justin S]

Have you done a compression check recently ? Luminition kits were the way forward on X flows and had one fitted on my engine in my Westfield.

[gus607]

Distributor Cap ?

[Zad]

Are the valves fitted with hardened seats? If not then they could have eroded.