hi everyone newbie I was thinking about upgrade to my  1989 softtail 1340 to efi is  it

as simple as I think it is or am i lookin for trouble 

Anything can be done, but it would cost a heap of cash.
I don't understand why you would want to though ?
A well tuned Carby is a sweet thing !

And welcome aboard !!

Welcome
If you really want EFI I think the S&S would be the only choice. I agree with speedzter with the carby

2001 Fatty with a carby here , cant beat the sound of a carbyfied engine IMO, lot easier to play with to with no puter and tuners needed just a screwdiver and little else

thanks guys for your input .I am being swayed to stay with the s&s Shorty Carb at this time as mates have swayed me as just pick her up from qld and road her home and have not given her a fair chance to prove herself over efi as yet as only riden jap bikes mostly only riden a couple harleys
And late mod efi ones thanks again for your I put guys

Do yourself a huge favour, and throw the S&S Carb away, and get a CV pumper, or a Mikuni.
You could find someone that can tune the S&S properly, but it will be better and cheaper to get a 2nd hand CV.

Thanks mate I've found that the ride down from qld has throw the Carb out running real rich and backfireing am looking round for a good shop to get a service and tune but will now be looking for Carb upgrade before efi upgrade thanks mate

Should be able to get a CV for around $100:

www.ebay.com.au/itm/Harley-Davidson-Keihin-40mm-CV-Carburetor-Carb-40-mm-27492-96-W-Choke-Cable-NR-/170793927911

Thanks mate just looking now and was unsure witch one you made it so easy for me does it fall out of tune or are they good at high revs or granny stye

The 40mm CV is good for 100hp, and when jetted right are very responsive (wont change tune !).
I still prefer and use the 42mm Mikuni, but they will set you back around $400.
Lots of info on the web for tuning the CV too.
You'll probably need an inlet manifold and mounting bracket to suit.

Go the mikuni mate--definateley miss that characteristic potato potato sound that only a naturally aspirated motor can make--had a mikuni on my fxrs and personal view only "it ran rings around the cv, but in saying that the cv needed some work--cheers Grim