Aftermarket long-stroke 440 block?

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dunc2027

dunc2027

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Forgive me if this is a stupid question. But, I've always been somewhat confused about aftermarket blocks. I realize this is very general, and the answer is almost garanteed to be "it depends", but: how many parts do "Mopar-based" aftermarket blocks actually share with production motors? Some of the giant blocks I assume have to change the cylinder spacing to accomodate such large displacements. And if they do, I'd imagine that means pretty much no factory Mopar part will bolt up anymore (heads, intake cam, headers) except maybe the dizzy, starter/accessories, motor mounts, and trabsmission bolt pattern. So does it really mean anything to be a "440-based" aftermarket block?

I thought about this while daydreaming of a (apparently non-existent) 600ci+ 440 stroker. 440source says the 543 kit is the largest possible because "any bigger and the rods will actually hit the camshaft." So my first thought was to find an aftermarket block with pretty much the same everything except taller, with more distance between the cam and crank centerlines. That way you have the ocean of 440 aftermarket support to choose parts from, but can obtain whatever ridiculous displacement you want. I wasn't succesful finding anything though, primarily because I don't know how to search for it. I suppose it would be self-sabotage in the busniess sense to post tables of all their motor's dimensions and what factory parts bolt up and what doesn't.

Obviously I have a lot to learn.
 
dunc2027 said:
Forgive me if this is a stupid question. But, I've always been somewhat confused about aftermarket blocks. I realize this is very general, and the answer is almost garanteed to be "it depends", but: how many parts do "Mopar-based" aftermarket blocks actually share with production motors? Some of the giant blocks I assume have to change the cylinder spacing to accomodate such large displacements. And if they do, I'd imagine that means pretty much no factory Mopar part will bolt up anymore (heads, intake cam, headers) except maybe the dizzy, starter/accessories, motor mounts, and trabsmission bolt pattern. So does it really mean anything to be a "440-based" aftermarket block?

I thought about this while daydreaming of a (apparently non-existent) 600ci+ 440 stroker. 440source says the 543 kit is the largest possible because "any bigger and the rods will actually hit the camshaft." So my first thought was to find an aftermarket block with pretty much the same everything except taller, with more distance between the cam and crank centerlines. That way you have the ocean of 440 aftermarket support to choose parts from, but can obtain whatever ridiculous displacement you want. I wasn't succesful finding anything though, primarily because I don't know how to search for it. I suppose it would be self-sabotage in the busniess sense to post tables of all their motor's dimensions and what factory parts bolt up and what doesn't.

Obviously I have a lot to learn.
Click to expand...

I guess 440 source doesn't know about CHP.

14905-DM-M535 - Chrysler 535 Dish Top -20.4cc Dominator Engine Kit
 
Callies is currently making new 440 blocks and they are super nice. I got one a couple months ago. All stock parts will bolt up but the block is substantially better than a factory block. It has ports for external oiling, 4 bolt cross bolted mains, billet rear seal, Siamese bores, thicker block all around. Its expensive but a very nice piece.
 
Mike, thanks for the tip on Callies. I did some snooping and found the page for these blocks: Catalog - Callies Precision Engine Components

However, I'm still slightly confused. The PDF info sheet doesn't mention a max stroke, although it does advertise cranks up to 4.75". Further, the digital catalog says the cam height is "Standard: 5.150in." If the height is the same as a production block (and therefore, I believe, the crank/cam clearance) then how is 4.75 stroke possible here? And, why is this block capable of such larger bores (4.600 max) if the bore spacing is the same?
 
I cant answer the question about the stroke. Likely the same as a factory block since the cam is not raised. The block does come already clearanced at the bottom of the cylinders for stroker clearance.
The bores can go bigger simply because the cylinder walls are much thicker than the oem blocks were.
 
Once you go aftermarket? It's really not a Chrysler engine. And once I realized that? Opens up other options for big cubes. Options that support Chrysler modules. Like bellhousing and 8 hole crank drill for hemi flywheel. My big cube Pro Street project? 1970 Cuda (heavily modified years ago for Pro/Modified stock drag racing. Too far modified to attempt build back to original.) 904 ci DOHC Marine Schubeck V-8.

The idea? Use an engine that was poured at the foundry and designed to be 1200 HP stock, (by sheer brute size and strength) naturally aspirated on pump 91 gas.

Just to throw out other options? There are other 2 valve taller deck engines out there? What could possibly go wrong? Lol.

ZomboDroid 27072020230012.jpg
 
Last edited:
cojohnso said:
Once you go aftermarket? It's really not a Chrysler engine. And once I realized that? Opens up other options for big cubes. Options that support Chrysler modules. Like bellhousing and 8 hole crank drill for hemi flywheel. My big cube Pro Street project? 1970 Cuda (heavily modified years ago for Pro/Modified stock drag racing. Too far modified to attempt build back to original.) 904 ci DOHC Marine Schubeck V-8.

The idea? Use an engine that was poured at the foundry and designed to be 1200 HP stock, (by sheer brute size and strength) naturally aspirated on pump 91 gas.

Just to throw out other options? There are other 2 valve taller deck engines out there? What could possibly go wrong? Lol.

View attachment 1715777754
Click to expand...

WOW - Mongo like !!!!!
 
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