We are preparing to release our new 2000 horsepower capable aftermarket iron 4.500" bore engine blocks by the end of 2026. Check out our Facebook page for details and pictures of the real blocks.
A few features of our new blocks:
Massive 1.500" thick main webbing. A stock 440 has main webbing about 3/8" thick. The Callies/Energy blocks are about 1/2" thick. The coveted "230" casting 400 blocks, capable of a reliable 1000+ horsepower, have main webbing about 1.200" thick. An OEM factory 440 block weighs 230 pounds. Our blocks weigh 300 pounds. 70 extra pounds of iron should tell you everything you need to know about how strong these blocks are. There is no comparison to any other mass produced Big Block Mopar iron block that has ever been made.
Super heavy duty CROSS BOLTED and doweled 4140 steel main caps. Not only are the main caps themselves considerably thicker and heavier than cast factory OEM caps, but Caps #1- #4 are all cross bolted with 3/8" bolts. ALL FIVE caps are doweled. Dowels precisely locate the caps, ensuring perfect bearing alignment and helping to eliminate any cap walk.
Bore comes rough bored at 4.495". Will need to be final honed the last five thousandths to 4.500" with a torque plate. This allows you to specify the correct crosshatch for the rings you are running (Moly, etc) and also to set the exact piston to cylinder wall clearance for your application.
Thrust bearing is machined for the superior LARGE thrust bearing with extra surface area, especially for manual trans applications.
Priority oiling. The factory oiling system leaves a lot to be desired. To get to the rocker arms, the oil has to go through the main lifter galley, down to the main bearings, then back up to the #4 cam bearing, then around the cam journal (which means it has to go between the clearance of the cam journal and the cam bearing, which is only a few thousandths of an inch...), then from there it's split into two, with each side going to one rocker shaft. In our block, we tap directly off the 1/2" diameter main galley with a HUGE 3/8" diameter branch galley which goes directly up to the rocker shafts. We also drill and tap those galleys for a restrictor plug, allowing you to exactly control the precise amount of oil you want going to the rocker arms. We also greatly increased the size of the diagonal galleys which feed the main bearings off the main galley. Normally, we sell an enlargement drill bit which you can use to enlarge these passages on a factory block. But we've gone even bigger on our block.
We've increased the deck thickness to a massive .600" thick!
Can be bored .100" over to 4.600", reaching basically 600 cubic inches (598.29 to be exact) with a 4.500" stroke crankshaft.
Has considerable additional material around the lifter bores, for additional strength, less flex, and plenty of material available if you wish to bush the lifter bores.
Features an integrated -12AN fitting on the front of the block, so you can use an external oiling pickup without a special "external" oil pump. Makes those large strokes easy and inexpensive. If you want to run a standard internal pickup, we have the adapters available for those as well.
Doweled rear seal cap. Pesky rear seal leaks are one of the most bothersome big block Mopar issues on OEM blocks. Our blocks feature .500" counterbored locating dowels to precisely match the rear seal cap to the block, and ensure both halves of the seal are perfectly aligned every time, helping to eliminate those horrible leaks!
All important factory components fit! This means, engine mounts, oil pans, timing covers, water pumps, fuel pumps (manual fuel pump pushrods work great!), cylinder heads camshafts, cam bearings, timing chains, etc... All OEM compatible. Bellhousing is factory OEM pattern.
Cost will be $2995. Shipping (in a wood crate) to the lower 48 will probably be about $500. We expect to have them on the shelf and available before the end of the year (2026). Keep an eye on this page, when they are on the shelf, they will be available to order on this page.
