...THE EASY WAY WOULD BE TO DROP THE MOTOR FROM A VERY HIGH PLACE...SORRY, COULDN'T RESIST. ANYWAY, THE PLACE YOU SHOULD START IS YOUR LOCAL JEEP DEALER, BECAUSE THE 258 HAS BEEN PUT IN JEEPS FOR OVER 30 YEARS. AND SHOPS THAT MODIFY AND RACE JEEPS CAN ALSO HELP, BUT THEY MOSTLY FOCUS ON V-8'S.