I have been holding on to these pics for a while. The first engine that I have installed cross bolted main caps in has successfully made trips to the track and lived. Knock on wood

Few more.

And more.

here we go again....

Sorry, I don't understand your meaning.

i've had this done before and it worked quit well; especially with light weight components.

Looks real nice. It always seemed like a good idea to me, but I have heard some negativity about this conversion. Don't know why. I think that some have found that it hasn't stopped any of the cap walk that it was intended to stop. Most say that the weak link is actually the block webbing, not the caps. I had Best Machine aluminum caps installed in mine. Maybe an aluminum 4 bolt cap with a girdle? But then, the cylinders wouldn't handle the power that the bottom end could handle. Anyway, like I said to start, looks great. Let us know if you notice any cap walk after the season.

One of my 440 blocks has the ProGram cross-bolt conversion; the other one has been fitted w/ aluminum main caps and will also have a CRE girdle added to it.

My only suggestion for the ProGram deal is they will be a LOT easier to remove if they'd been drilled & tapped for a slide hammer to pull 'em straight up from the block. Otherwise, it's been a major PITA to work 'em back & forth enough to free them up from the block when I've had to remove the crank.

And, yes, this is the sort of post that's liable to bring out all the folks who don't like this approach. Moparts... feel the love.

I'm indifferent on the modification.... but I guess deep down I have my suspicions as to what degree it actually helps. Guess for the cost involved I'd go with the aluminum main cap route. What HP level are we pushing that poor old OE block to?

Looks good !

I have tried using a girdle. Didn't work for me. Now I will see what happens when I increase the cap strength. I haven't tried aluminum caps yet. I have a hard time understanding how they would stop cap walk. I think it may be making it harder to detect. But I do intend to try some in the future.

Thank you!

Thank you!

I like the 4 bolt caps... will it STOP cap walk... no
but it does stabilize the cap better... but the cap is
still bending/bouncing to give you the cap walk... thats
weight and/or detonation... I have 1 SB that has 4 bolt
mains(not cross bolted) and I like that block.. it has
shown to be good over the years.. the outer bolts are 3/8
but the caps are massive.... billet steel
EDIT
looks like you might have to grind the side washers
to clear the pan(just guessing on that.. but looks close)

PLEASE do us a favor. Don't just come back a year from now and say "oh ya it works" like many of our members that attend 3 Mopar races a year and run 10's. I would for once love to hear how quick the combo was, weight, and how many passes till it expired. I made it 275 passes with no concrete, no girdle, and only a set of 440sourse billit 2 bolt main caps. When I took the engine apart I found a crack up thru the block. This combo ran 8.60's -8.90 at 2400 pounds. This was with a .055 over 4.125 based 440 block

I see from the pics it's a 400 block.

Is it the cold weather casting with thicker mains?

They DON'T.........nothing does

No problem. This car makes more passes in one weekend than most people get to make in a year. That is when we win

Average 400. I wouldn't want to use a good one for a bracket engine

. Great to hear but I can't believe guys don't have any idea how many passes they put on their combos. I love the info and learn from it so I log every pass. Instead guys will say I ran this for five or six years and it held up great. But they only put 20 passes a year on their car. Lol