You're also likely to have to either add more wires to the connectors or lose features. For instance, I suspect that PS/2 starter set doesn't have smoke. It also likely doesn't have all the lighting features of the Premier.
We did also gloss over the fact that you have to move the tach reader and supply a new mount.
Buy a PS-3 Diesel kit and upgrade it right. You will get into a lot of head aches unless you understand all the difference between PS-1 and 2. G
This is the best advice, while moving the RK stuff can be done, it's going to be a lot of work with an uncertain outcome.