I have tried part of that way to Kelantan as follows:-
Singapore to KL.
KL to Karak, Gambang, Pekan, Kuantan Pahang,
Kuantan to Cherating, Rantau Abang, Marang, Kuala Trengganu.
Kuala Trengganu to Tumpat, Kota Bahru, Kelantan.
Kota Bahru to Gerik, Ipoh, Perak. (very winding road certain...