A 2.9 will never be a powerful engine or a great gas mileage motor.
The best gains can be made by simply gasket matching the upper intake, lower intake & heads
If you want real power swap in a 5.0
If you want fuel mileage swap in a 2.3 4 cyl
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1988 Ranger STX, custom built flatbed, winch, 33x 10.5 BFG mudders
1974 Suburban (AKA "the sub") lockers front & rear, 383 cu in not even close to stock motor, snowplow 37 x 12.5 HUMMV tires, 4.56 gears
1952 M38 (CJ3) Jeep - my newest project - 289 ford, hardtop, got it with not one wire in it. Hope to have it driving this year
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