No upgrades, rob a lot of power, and will get hot under heavy slow wheelin, not able to run any Marlin case.
Upside, if you upgrade cooler and are able to run low enough r&p's it will wheel ok, not great, but ok.
As a daily driver, they are ok, but still rob power, and milage. I had one in an '86 4runner daily driver and I didn't like it. It also had a weird shift to it.