sounds like a worthwhile project. I would rethink going to a diesel fired burner. yes you will get amazing heat but it stinks and you will get soot over everything. You will need a separate fuel tank just for the burner and you don't want to run out before the job is over. I would replace the heat exchangers, on that engine, you should have awesome heat if you utilize the coolant/exhaust/blower heat. Yes it can be a pain to redo and you will bypass excess water to the recovery tank. Ever hear of an A>P>O. You will have a powerful/hot machine in the end with just one fuel. Thank me later.
There's alot more that goes along with heat exchangers than just freaking heat brother....half the bullshit that messes up or bogs down the performance of your machine is heat exchanger related (solinoids, diverters, choking down blower and engine exhaust to make them run hotter etc, etc).
I run 14' foot box vans so a small 10 gallon fuel cell isn't an issue, if burners are adjusted correctly air/fuel they burn pretty clean very little if any smoke or smell.
On my other machines I utilize the coolant heat exchanger as a preheater then run into the eurotec burner it gives me 280 all day long instantly doesn't matter if it's 70 degrees or 10 below outside has no affect on my heat unlike heat exchangers.
Utilizing the coolant heat exchanger on my cds allows me to run the piss out of it on about 5 to 10 dollars of diesel a week. We'll worth it for me =-)
