Definetly would see about putting more commonly(ARP) performance studs in the buids.....

Guess Mopar was nice enough to me to use somewhat decent bolts in my R3 mains....held up to 2-300 more HP than most of yalls big blocks

Though have stepped up to ARP suds now.

Great post! About 6 months ago I was converting a customers B1MC motor (Alum World block) to Predators and found the main studs streching I replaced them with arp. I have been concerned about this ever since and was wondering if this was a random thing, GUESS NOT!

have one world aluminum block ..should soon begin the build ....not funny to here this isue
as i was under the impression that i have got an god quality part

not intending to hijack, but do any of you engine builders measure main stud stretch? i do. my friends think i'm insane like that, but it's just paranoia.

We have done a few World block builds with the iron blocks and never had any issues with the bolts.

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I would like to point out that over the years I have experienced failure with hardware manufactured by ARP, but grab another one and move on.

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Really?!?!

I'm sure your vendor really likes getting thrown under the bus in an effort to make you seem less....how shall i say this delicately...retarded!?.

I guess I can't understand the logic in purchasing ARP nuts but not studs?!?

I guess I can't understand the logic in purchasing ARP nuts but not studs?!?

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That part is pretty simple.... cost... plus like they
say now... ARP hardware... they arent lying... just
not telling it all

Great info here, thanks.

I just checked my World aluminum Hemi short block assembly:
- main cross bolts are ARP
- main studs are no-name, their nuts are ARP
- purchased 02 2009.

I try to attach two photos, now.

... heh, well, at least I managed to attach one photo... Ok, here comes the other one, I hope:

It seems I may have stirred up a bit of a "sh**storm", with my well intentioned CAUTION post originally ?
That was not my intent, however, given subsequent responses, and the prevalence of similar experiences from others finding this Inferior Block Hardware and the Main Stud "Failures" @ Load, I would like to clarify a few things.

* I took issue, with the Mating of genuine ARP Nuts, to NON-ARP Studs in the Block as delivered from World Products.
I, like others on here it seems, find this "questionable" product practise ?

* I also take issue to references from a World Representative, of Foreign made Torque Wrenchs as being an "Unfair", but nonetheless STATED, potential cause for the Stud Failures ?

* Lastly, I am somewhat peeved with further references that World "Engineers"?, have determined "those studs to be of sufficient quality".

In Response to the above;
I will be shipping all the Studs in question, which I feel are defective, for a complete Mettallurgical Analysis, both Destructive Tensile & Non-D, Rockwell, etc., etc., full spectrum.

I am lucky enough to be located Geographically in the Oil & Gas Capital of North America, with some of the most reknowned Industrial Engineering Infrastructure & Testing Facilities in North America close by.
They Test "metals & fasteners" all the time, on everything from Blow-out prevention Fasteners to Sour Gas Well Hardware.
Remember the recent Gulf Oil Spill Fiasco ?
We produce more Oil here in 1 Day, than that entire LEAK spilled in the Gulf!

My point being,
stay tuned,
I WILL have a Full Report on the Studs, and their compliance with any "known" Industrial Standards ASAP.
It will some take time, I will report back when completed.

Personally, If this had to go beyond my original CAUTION post, I would have sincerely hoped, and expected, that World Products would have stepped up, and indicated knowledge of a "suspected" supply chain management problem involving Wrong Main Stud hardware, and asked for imput from those affected for some kind of remediation effort ?
Just Good Business in my opinion only.

I sincerely hope, that the Stud Analysis when completed, is NOT akin to a rating of the Cheapest poor quality fasteners available, and NON Compliant with any "known" Industrial Technical Grading ?
THAT, would sincerely compromise any Findings by World "Engineers" of Fastener suitability ?

I Thank You for your time, and apologize to this Boards Onwers, for using up valuable Bandwidth, on what should have been a NO BRAINER Caution report.

BC is the oil and gas and capital of North America? I find that hard to believe.

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* I also take issue to references from a World Representative, of Foreign made Torque Wrenchs as being an "Unfair", but nonetheless STATED, potential cause for the Stud Failures ?

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I am not here to defend his post. A few others have made mention that we were accused of using junk Foriegn made torque wrenches but read his post again. He never accused anyone of that if you read it as I did he was not in any way going to lay that as being the cause.In fact I think he was disregarding it as possible and unfounded excuse ,

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I would love to be able to say that there are many torque wrenches that are being used that were manufactured in third world countries and that is the problem, but that would be unfair.

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have to ask how is the starter mounted when using a chevy bellhousing glide???
and what starter is being used???