Two short radiators mounted at an angle would fit the area behind the grill and allow a few more inches of room in the middle for the crank snout and water pump pulley. Electric fans would probably be needed for that setup.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!