Man,
That looks like one of my installs I LUV IT!
Spent lot of years trying to put together something no one else had,woke up lots of nights with fixes in my head that had to be tried right then before I forgot! I have a Cummins Diesel in one of my 1949 3800 series trucks and love it!

Home of the "Texas Beast" Cummins Turbo Diesel powered 1949 Chevrolet One Ton Pick-up and numerous other trucks, cars & mosikles. Inliners # 1564