I am going to look at a 6.5L K3500 today and if there is no excessive blowby I will probably be buying it for a wvo conversion.

My plan is as follows:

HIH lines from the tank to the engine compartment
Fuel pump and filter in the engine compartment on the turbo side
Flat Heat Exchanger as close to the IP as possible (along with both fuel temp and pressure senders)

My question is relatively simple: which pump, filter and heat exchanger should I get (for reference I am in Alberta Canada and in winter mountain driving do see -50 Celsius)? Which parts represent the best value (i.e. not the cheapest but will do a good job without spending excessively)?

I will be pre-filtering / dewatering all fuel via centrifuge.

Thanks