A big-block Mopar has never needed much help making an entrance. But when the plan calls for serious displacement, a stout rotating assembly, and enough throttle to rearrange your priorities, the block deserves more thought than “we found one behind the shop.”

The Bill Mitchell Products BMP 088550 Aluminum 440 Wedge Engine Block gives your next RB build a fresh foundation with 357-T6 aluminum construction, billet steel main caps, and replaceable cylinder sleeves. Bring the big-block ambition. This is where you start bolting it together.

Aluminum Construction. Heavyweight Intentions.

BMP designed its aluminum 426 Hemi/440 Wedge block family for RB applications ranging from stock-style builds to competition engines. The technical description lists 165 pounds with main caps, hardware, and cylinder sleeves, giving builders an aluminum alternative to the traditional iron foundation.

Inside, billet steel main caps handle bottom-end support. Caps one through four use two main fasteners plus cross bolts, while the rear cap uses a two-bolt arrangement. ARP main studs round out the hardware beneath the crankshaft.

Up top, a minimum .600-inch deck thickness puts substantial material beneath the cylinder heads. Down below, BMP lists clearance for a 4.500-inch-stroke crankshaft with steel connecting rods, subject to the rotating assembly’s clearance requirements. That ought to get the displacement calculations going.

Familiar Mopar Layout, More Building Possibilities

The 088550 Wedge block retains the stock camshaft location and accommodates standard cam bearings and stock main bearings. Standard-width oil-pan rails and the stock pan bolt pattern help maintain familiar architecture, while the oiling system accepts a stock-style external oil pump and can be configured for dry-sump use.

BMP also provides Chrysler and GM bellhousing patterns. Using the GM pattern requires a Reid or JW bellhousing conversion for starter mounting, giving builders another transmission option to consider.

The point is flexibility. Whether the project wears polished paint, drag-strip rubber, or a suspiciously innocent set of steel wheels, the foundation can be planned around the combination.