I have a Lamtrac LTR 4000 snogroomer w/6BTA cummins, w/out a grid heater. My problem is starting in winter. Can I fit an intake grid heater in my intake manifold? Without (still using) removing the aftercooler on the intake manifold? I can find relays for it, switches and all, and I can work it w/o the ecm. My question is, can I put an intake grid heater in my intake manifold,while still using the factory aftercooler from cummins on a 6BTA series engine?