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Heater core replacement

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Hi guys anyone here ever replaced their heater core yourself? any hints, tips? TIA, Mike

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http://hometown. aol.com/hotshothauler/myhomepage/business.html 2000, CTD 3500, Air brakes on truck & trailer. 210,000 miles todate. DOT custom built sleeper unit. pulling a 40' G/N flatbed
2000 FL-70 Pulling a 48' low boy. 211,000 miles
Just bought another 92 D-350 215 P-Pump motor and NV 4500 180,000 miles 24 lbs boost all stock For now
 
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Do you have AC ? If so you will need to have it vacumed out becouse you will have to disconnect the ac lines from the evaporator. Other wise it is no big deal. You have around 6 nuts on the engine side of the fire wall to remove, the power wire for the blower motor and inside there is a screw going through the kick panel holding the heater box. Remove glove box and up toward the drivers side there are 2 7/16" nuts, loosen (don't remove). Also on the kick panel wall there is a bolt that holds the dash lower frame(I think it is 1/2") this will let the dash to move out when you pull the heater box out. Remove dash gauge panel(don"t forget there is a hidden screw just above the radio). Remove heater controls and disconnect it. Make sure that the heater control cable and vacum lines are free, and are not wire tied to any thing. remove heater box by pulling it into the truck and rotating it downward(put a cover on you floor you will have antifreeze come out)this should not take much force to remove. when you take the heater box apart, there are some screws hidden under the rubber seal. I if you have any more questios just let me know. Kyle

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1985 DODGE 1 ton Crew Cab W/8' box converted to 4X4 in 1999. Upgraged to a non-intercooled 1991 Cummins Turbo diesel & rebuilt 5 speed Getrag in 2001. Freshly rebuilt and Balanced Cummins, Rebuilt NP205, Rebuilt Injector pump and tweaked, Matched Injectors, 3" New Mandrel Bent Exhaust,no muffler, Borgeson Steering Shaft, K&N Air Filter, 4:10 gears, limited slip rear end, 16" Goodyear GSA Wranglers, 16K Reese 5th Wheel Hitch,and LE Package, OEM Cruise Control, and a Sony CD Stereo. If you want to know why I did all of this, 3 kids and I can't stand F**d and Ch**y. Kyle Hoover ,Fruitport, MI.
 
I had my heater box out of my '91 W-250 when I installed a factory A/C system last year.
If you remove the glove box, there is a section of the lower dash structure that unbolts and allows a little extra clearance between the heater box and lower dash during removal / installation of the heater box unit.
I had to replace the entire heater box assembly, and install a replacement unit with an evaporator for the A/C system installation.
Does anyone know if the heater cores are the same part number for the A/C and non-A/C units? I have an entire heater box assembly for a non-A/C first gen Ram complete with the heater core, blower motor, controls, etc.

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89 D-250 LE 5 speed 3. 55 Limited slip, Banks Intercooler, 'Ol Blue Specials, K&N, Full Boar Muffler, 3" exhaust, Diesel Dynamics Stage 1 kit, Boost/Pyro. & 16cm2 215K miles.
 
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