Guys thank you so much for your valuable comments and advices
Currently my car KP60 2nd gen rectangular lights is running a stock 1k engine ( i suppose ) its a 1000cc with 4 speed forward gearbox i guess its K-40.
I need a 5 speed gearbox so that it could have much better gear ratios and the engine won't be begging to give me another gear 
as far as the shaft is concerns the 4efe is going to be running on cng and petrol.
I have chosen 4efe because of its best performance and millage specially on cng
When i would be installing an AC system in my car i need a bit heavier engine then 1000cc 1K to take the load so guess i am safe.
Because i would be running the car on efi so i am expecting better results then carby.
I have a complete un cut wiring of 4efe
Pics are attached for your reviews.
