Most of the wires / hoses builders add around here are sourced from places like telephone wire, small diameter wire can be purchased at craft stores usually in the jewlery making isles. Small gauge solder is a favorite of mine, very flexible and takes paint easily. Fishing line works also Springs I just make from wrapping small diameter wire around drill bit, and cutting to desired length. I try to avoid buying the specialty stuff when possible , when most of the details can be made from common household items.. Under hood insulation - cut a shop towel..like those blue ones mechanics have rolls of and glue on w white glue or tacky glue.. Hope this helps get ya started
That's why this forum is so wonderful, there's so many knowledgeable people willing to help us builders out at a seconds notice . Being able to explain the tweaks to make these trucks period correct is so important for realism, and depending on time period !
I've been doing research on the IH school bus lately too ! Been searching for a hood from the 2575 IH tractor Gary wallace suggested using the IH motor from the farm tractor kit as a base for the DT-466T engine.