It sounds like you really want warm air before the engine gets up to full operating temperature.
If you really want air warmed by coolant before the thermostat opens then plumb in a second heater core off your exixting heater core plumbing and build an air intake for it.
Then your intake air temperature will rise along with your coolant temperature.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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