I'm working on a 1947 Seagrave fire truck with a 906 ci V12. The motor is only 5.5 to 1 compression to start with (odd combustion chamber/valve arrangement...valves are 90 degrees to clyinder bore!) I am thinking it needs some sort of forced induction.

For suspension it is gonna get slammed..... 4 links and air bags.

Wheels and tires are going to be modern big truck stuff (22.5 or 24.5)

Body wise, it will get 2 more doors (4 total) 2 more bench seats (3 total, seating for 9). Holes left by missing fire fighting stuff are going to be filled. Storage areas under the body are going to be built (9 people usually carry lots of stuff).

It may get a convertable top (with lift out side windows).

Something like this.