Hi Khun Sayan
As dsn replied below they will look into possibility of future new product but takes long time. This is the best they could do now due to cost and economical scale. If any further infor I have will share with you again, thanks for your support.
"Sayan, Unfortunately we do not have a long block that will fit this engine. I have our engineering team looking at one for future new product but that will be months away if they decide to offer it. The 359-0734 short block is the only offering we have that fit this engine. I do not know the process to return the long block. You will need to work with your parts department for that. Anything else I can help you with? "
Sean Tan
Service Technical (Asia)