mine was carburated,i am doin the swap now back to efi,,and ill start off by saying this is alot more expensive,but i couldnt stand the carb,no response,starting problems,it was a pain for me every step of the way, im sure if someone had tuned the carb properly it would have ran fine,could have just been my experience .my 86 never had any running issuse,and thats what im swappin in,,for me the reliability is worth it alone,and i use a really good tuner,,if u just want simplicity and good looks,cheap, stick with the carb and someone who knows how to tune it would probly be best,,,but if u want best results go efi