Just a little more info for you.
5700

The Vortec 5700 L31 is a V8 truck engine. Displacement is 5.7 L. It is the last production Generation I small-block from Chevrolet. The cylinder heads feature combustion chambers very similar to those of the LT1 V8, but without the reverse-flow cooling. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. It offers the performance of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (a Vortec head has four bolts attaching the intake manifold as opposed to the traditional six bolts per head). The L31 was replaced by the 5.3 L 5300 LM7. The 2002 model year was the final year for the L31 5.7 L small block V-8 whose origins date back to 1955. The Vortec 5700 produces 255 hp (191 kW) to 350 hp (261 kW) at 4600 rpm and 330 ft-lbf (448 N·m) to 350 ft-lbf (475 N·m) of torque at 2800 rpm. It is currently being produced as a crate engine for marine applications and automotive hobbyists as the "ramjet 350" with minor modifications.

L31 applications:

* 1996–2003 Chevrolet Express/GMC Savana full-size vans
* 1996–1999 Chevrolet/GMC C/K full-size trucks
* 1996–1999 Chevrolet Suburban/GMC Suburban full-size long-wheelbase SUVs
* 1996–1999 Chevrolet Tahoe/GMC Yukon (and 2000 Tahoe Limited) full-size short-wheelbase SUVs
* 1999–2000 Cadillac Escalade

TBI L31 applications

* 1996 G-Series vans over 8,500 lb (3,856 kg) GVW w/ 4L80E transmission

Special applications

* Oscar Mayer Wienermobile
* Isuzu Box Trucks

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