new to diesel, do and do not's
 

hi im new to diesel. just bought a 94 chevy 1500 4x4 with a 6.5L turbo diesel and a 3 speed automatic tranny with overdrive. this thread isnt model/engine specific i just threw it out there.

but i was doing alot of reading and decided to post a few questions. the first being coolant flush's, best brands of coolant flush kits. and then the best coolants.

the second thing i wanted to do was to wrap my exhaust, turbo, and intake piping with that heat wrap stuff, header wrap i think its called. anyone done this? any noticeable gains?

also my truck has 227k miles on it and i dont know when things like the injectors and glow plugs were last replaced. at this mileage point or in the near future say 250k, what do people usually do? both to make it more reliable and long lasting, and to improve performance and get back any lost power.

third being the idea of mounting up a front mount intercooler and where it could or should go. anyone done it? any gains? i know they work on small gas powered cars.

i also plan on doing the duramax 21"fan with a severe duty clutch.

any other suggestions and ideas are welcomed.