A NV4500 is absolutely the best way to go if you have the budget for it. Mating to a 205 is also the best you can have. I just did this conversion 2 years ago on my 87 K30. If you need pics or info, I could direct you to my Instagram but I am brand new on here and I am unfamiliar with the rules. I am not sure if I can share info. If so, I could send you my website or phone number. Good luck.