Big Mopar main caps

[Mike Taylor 3601]

We had customer years ago that had split several 440 blocks in the mains and wanted to girdle it.
We built a .625'' thick girdle,can have laser cut to your pattern and Blanchard ground,we made a set of steel caps that were tall enough that they were flush with oil pan rail,girdle attached w/oil pan bolts and several countersunk bolt around oil pan rail and main studs and had a hole in each main to pull caps with slide hammer and attach to mains also,if you make mains don't use expensive hard material,want a low grade steel it expands close to same rate as cast,but is way stronger,they ran this block many years.
Now days,unless you could do it yourself and like to piddle,I say buy a aftermarket block,that wasn't really a option back then.
Mike Taylor 3601

[camdog440]

Originally Posted by Mike Taylor 3601

We had customer years ago that had split several 440 blocks in the mains and wanted to girdle it.
We built a .625'' thick girdle,can have laser cut to your pattern and Blanchard ground,we made a set of steel caps that were tall enough that they were flush with oil pan rail,girdle attached w/oil pan bolts and several countersunk bolt around oil pan rail and main studs and had a hole in each main to pull caps with slide hammer and attach to mains also,if you make mains don't use expensive hard material,want a low grade steel it expands close to same rate as cast,but is way stronger,they ran this block many years.
Now days,unless you could do it yourself and like to piddle,I say buy a aftermarket block,that wasn't really a option back then.
Mike Taylor 3601

Yes, a girdle is an option. The one in the attached link appears to be the beefiest on the market. It seems very similar to what you were describing, Mike, except with aluminum caps.

http://www.bcrproducts.com/caps_and_girdle_system.html

Of course, now your talking about $800 for the cap and girdle system... plus another $400 to $500 to install and align bore. That's a significant investment in a 40 year old block, and a decent down payment on an aftermarket block... if they existed.

[rickseeman]

Don't waste your money on aluminum caps. Run what you have and start saving your money for an aftermarket block. The Mopar blocks will be out in a few months but they are so heavy. Save up for aluminum unless you can live with the weight.

[camdog440]

Originally Posted by rickseeman

Don't waste your money on aluminum caps. Run what you have and start saving your money for an aftermarket block. The Mopar blocks will be out in a few months but they are so heavy. Save up for aluminum unless you can live with the weight.

If I go the route of stock main caps and ARP studs, should I put a girdle on it? At least there would be no additional machining expenses.

Some people do say a girdle makes the bottom end TOO rigid.

[Mike Taylor 3601]

Originally Posted by camdog440

If I go the route of stock main caps and ARP studs, should I put a girdle on it? At least there would be no additional machining expenses.

Some people do say a girdle makes the bottom end TOO rigid.

I don't believe there is such a thing as too rigid on bottom end,more stable you can keep mains the better. IMO
Mike Taylor 3601