Check out LT1 Engine - V8 Small Block Engine 3D model on CGTrader for $189. High-quality Polygon mesh mesh by markos3d: 10995640 polys, 5598904 vertices.
STL (Stereolithography, filesize: 158 MB), OBJ (OBJ, filesize: 114 MB), MAX (Autodesk 3ds Max, filesize: 30.7 MB), 3DS (3D Studio, filesize: 42.2 MB), C4D (Cinema 4D, filesize: 82.9 MB), FBX (Autodesk FBX, filesize: 96.8 MB), LWO (Lightwave, filesize: 151 MB), HRC (Autodesk Softimage, filesize: 156 MB), BLEND (Blender, filesize: 178 MB)