I have a tank style heater also and plan to install as dependable posted,I have to fab up some mounting brackets for mine.The main thing with the tank style is the heater must be lower then the feed point.If you feed from lower radiator hose its really hard to install heater lower then that point.Im using a hotstart heater# tps151gt10-000,it has no check valve so it will flow both ways.So it should work when following dependables install link.When the truck is running coolant will flow from pass.side head thru block heater to heater core.But when motor not running the block heater is fed from heater core inlet and block heater outlet goes into coolant crossover to heat engine.Another way is feed it from bottom of radiator on drivers side by removing rad. petcock and adding a barb fitting in its place,then install a hmmwv coolant crossover,it has a port on drivers side you can tie into.But you still need block heater lower than the point feeding it.The nice thing about the Kim Hotstart units are they are rebuildable and have a built in thermo.heats block 100-120 degrees and turns off at 120.If your temps. rarely get down to -10 or below just install a temro freeze plug block heater,1000 watts. Friends don't let friends buy Katz.
