Firewall: to swap or not to swap?

[jrdecat]

In reading pages and pages of threads of countless projects and builds I notice that there are usually several ways of accomplishing the same task.

Specifically, some people prefer to cut the firewall from a donor and patch it into the new cab, while others prefer to fill every hole on the new cab and then mount components as needed.

My project is a 53 GMC 5 window cab dump truck that will eventually sit on an 86 K10 frame and using the 5.7/auto tras combo. I bought the dump truck because it had a great cab and it has the bigger, wider fenders for a full size frame.

I'm just curious...with YOUR project, which method did you choose and why?