These are water heated manifold, no heat riser. Re-routing the lines will have no effect, you will still have a heated manifold. And running it through a small cooler, you need a way to pump the water. Best bet is to just bypass the manifold. Just go from water pump to heater core, then from core back to thermostat housing. Remove hose nipples from manifold and install some plugs. True you want a cold charge of air, but the fuel has to be vaporized also. If this will have any effect on the way the engine runs, you will have to ask someone who lives in similar part of the country, can't help you there.
1986 CJ7, 4.2 w/4.0 head, TFI-HEI hybrid ignition, Clifford manifold w/Holley 390 w/cold air intake, OBA, 4.5" lift, Woody CV shaft and Tattons in front, 4.10 gears - lunchbox in front, Truetrac in the back, twin-sticked, blower upgrade for running topless, trying to keep it simple.
It's just a Jeep, and if you don't wheel it once in a while, it's not even that.