If an all-aluminum Gen IV engine has you captivated, SLP and Scoggin-Dickey Parts Center (SDPC) build 402ci or 416ci alloy engines. SDPC combines an L92 aluminum block with a 4.067-inch bore and a 4.00-inch stroke Eagle crank, along with Scat H-beam 6.125-inch rods to produce this lightweight package. If that seems tame, the company also offers El Toro Grande (The Big Bull), a 440ci LS7 block motor with a 4.100-inch stroke crank pushing 4.127-inch-wide pistons. The only thing bigger is World Products' Warhawk block; this aftermarket aluminum block can pump the bore up to a wide 4.125 inches. When you combine that with a 4.00-inch stroke crank, it equals a Rat-like 454 ci.
| DESCRIPTION | PN | SOURCE | PRICE |
| 383ci LS1, 4.00 stroke | LPELS1LS6SB383FT | Lingenfelter | $4,295.00 |
| 383ci LS1, 4.00 stroke | SDLS6SB383FT | Scoggin-Dickey | 3,949.95 |
| 402ci LS2, 4.00 stroke | SDLS2SB402FT | Scoggin-Dickey | 4,349.00 |
| 402ci iron 6.0L, 4.00 stroke | 12400M24 | SLP | 3,821.35 |
| 402ci aluminum 6.0L, 4.00 stroke | 12412M58 | SLP | 4,136.35 |
| 416ci L92, 4.00 stroke | SDL92SB416D10 | Scoggin-Dickey | 4,689.00 |
| 440ci LS7, 4.100 stroke | SDLS7SB440FT | Scoggin-Dickey | 6,249.00 |
| 427ci LS7, 4.00 stroke | LPELS2SB427 | Lingenfelter | 6,395.00 |
| 454ci Warhawk | 101264 | World Products | 8,397.99 |
| GMPP block kit | 19153789 | Scoggin-Dickey | n/a |