Re: 86 Bronco II 2.9L Performace mods
I've heard that dual exhaust works great using the stock cast iron manifolds. There should also be a conga line of cats that can be replaced with a single free flow unit. That's about it. The rest is worthless for the cost. Electric fans, Jacob's/MSD spark, racing stripes. A tune up could help depending on how good it is running. The expensive way to go is a mild 302. Almost forgot, I ran 4.10 gears in my Ranger stock (LT235/75r15's). A lot of people like that also. No extra power but it feels like it as your axle torque multiplication is stronger. I liked the engine as it was bomb proof. The trannies sucked bad. I also didn't like the Dana-27 up front. You might be able to do an upgrade to the front axles on the 4.0 Rangers.
82 CJ-7, 97 TJ Sport, 90 Bronco