Hello, I have a 1984 C20 with a SM465 transmission. I will be putting in a (1986) 350 which I stroked to a 383 which has a Borg Warner super T10 4 speed transmission. I have 2 main questions. 1. Can I use any of the existing frame/engine block motor mount components or do I need to replace some or all of the components. Also, will I need to do anything to the drives shaft, shorten, lengthen??? Thank you for your help