Harlan,
Welcome. For that price I would try the Lucas injectors. They flow more fuel than the Power Wagons. Also known as Old Blue specials and Prince of Darkness injectors. I would recommend Big Don for a great price. What you were quoted is kind of high.
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90 W250, 5-speed, isspro gauges, 16 cm2, K&N, Borgeson shaft, JRE 3" exhaust, Banks Intercooler, Lucas injectors