First welcome.

The 2.8 V6 only is rated for a couple of horsepower more than the 4 cylinder. It is too bad that the prior owner had the 2.8 rebuilt as he probably could have had a 3.4 put in for about the same money.

I had a '91 also. I had replaced the 2.8 with the 3.4 and it made a world of difference. There are some things that can be done to the 2.8, but the gains are relatively minor.

The engine I your Rodeo was a whole different beast. Also, your Rodeo weighed less and had a much smaller frontal area.

Jim Paget
88 YJ with a few changes