The bowl is at the right float level on the glass so it is pumping fuel and the spark plugs were wet just after turning it over. I will try the earths and cleaning connections

Has it got fuel out of pump? Try cleaning earths and also pos battery cable connections.

My a12 motor was running perfectly until the other day when it started to jolt and buck as though it was skipping sparks. It would run for a little bit but only if I was giving it extra fuel and now it won't start at all.. It tries and sounds like it is getting the average spark but won't kick over properly. I've put new spark plugs, leads, distributor cap, coil, bypassed the ballad resistor, changed relays, fuel pump and fuel filter but still tries to kick over but simply won't start. Any suggestions???