[Russell]

Most common source of a 4BT is a Chevy breadvan, or a wrecked UPS, fedex etc truck. The ones in the Chevy breadvan have engine mount adapters, and a transmission adapter for an SM465 for sure, and also an auto, but I cannot remember which, which makes them nearly a bolt in swap in one of these trucks.

The stock 4BT makes about 105hp, and the 4BTA (intercooled) makes about 120hp, however, the torque is excellent, about 300 ft lbs for the 4BT, and about 330 ft lbs for the 4BTA.

With simple pump mods, larger injectors, and by cranking the boost up, you can be in the 200 - 250 horsepower range, with simply amazing torque levels from 450 - 500 ft lbs of torque. Thats all from a 3.9L 4 banger, that will get 30 mpg with overdrive and good gearing!