Lumpy engine.... Firing on all 5

Only on an Alpine....
Since putting the engine back in the car, it seems VERY lumpy on idle, like it is only firing on 5 cylinders.
I have removed, examined and cleaned the plugs and checked that all the HT leads are firmly clipped into place.
While the car is running, I have disconnected the HT leads in turn and 4 cause the car to idle worse and 2 make no difference at all (the front 2 cylinders by coincidence). I have inserted a plug into the suspect HT lead from a front cylinder and there were loads of spaks.
Oh yes, I have checked the earth, twice now.

Any suggestions?

On the two that make no difference, have you got the two leads backwards?

Simple stuff first

Good point, I'll check that at first light tomorrow.
I did replece the dizzy cap while the engine was out, however I did also mark up and number the leads 1-7 from L-R before I removed them, but I will still double check.

I know you have a bit of a blind spot for Left and Right

More than 1 blind spot Martin, I seem to have a dys-lex-lic temdancy, now I don't even seem to be able to count up to 7.
Feking lectrics !
Whoos , the dizzy leads for cylinders 1 & 4 were the wrong way round, Now I'm purring on all 6 pots, well smooth.
Amazing how it started so well on just 4 pots though.

Cheers I'll be racing this weekend, so long as I get an MOT this afternoon

More than 1 blind spot Martin, I seem to have a dys-lex-lic temdancy, now I don't even seem to be able to count up to 7.
Feking lectrics !
Whoos , the dizzy leads for cylinders 1 & 4 were the wrong way round, Now I'm purring on all 6 pots, well smooth.
Amazing how it started so well on just 4 pots though.

Cheers I'll be racing this weekend, so long as I get an MOT this afternoon

good luck mate keep it on the black stuff

More than 1 blind spot Martin, I seem to have a dys-lex-lic temdancy, now I don't even seem to be able to count up to 7.
Feking lectrics !
Whoos , the dizzy leads for cylinders 1 & 4 were the wrong way round, Now I'm purring on all 6 pots, well smooth.
Amazing how it started so well on just 4 pots though.

Cheers I'll be racing this weekend, so long as I get an MOT this afternoon

lol, youll be surprised, they can still chug along on 3, and drive..

They don't actually need all the spark plugs either as I found out when one undid itself and blew out of the engine at dead on the legal motorway limit of 70mph , breaking the HT lead. She kept running - quite smoothly as well. The noise was a bit of a giveaway though!

At that moment I thought my nice shiny new GTA that I'd only had for three weeks had gone bang big time - it made a hell of a noise! I had that unpleasant sinking feeling I can't tell you how relieved I was when I opened the engine cover.

Very wierd - never had this before on any car. I just put the plug back - bodged the lead back together to get home - nice shiny new set of leads and it's been perfect since.