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I have a 408w that was just built, 8.5:1 comp, and shooting for around 800+ to the wheels, should be very easy to do and plenty of people make them live there.
 

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I have a 408w that was just built, 8.5:1 comp, and shooting for around 800+ to the wheels, should be very easy to do and plenty of people make them live there.
lol so your planning to make around 950hp? at the crank with Stock, rods, block and the factory 2 bolt cast iron caps? lol,
its a wonder how the aftermarket block companys stay in business as there Nodular Cast Iron Main Caps are only rated good for 600 to 700hp...

http://www.jegs.com/p/Dart/Dart-SHP-Special-High-Performance-Blocks/1029740/10002/-1
("Designed for high-performance and heavy-duty applications producing up to 600 horsepower")

btw, heres another busted 600hp n/a C block...
www.the351cforum.com • View topic - My junk


...that was using fretting factory cast iron main caps.

important iron/steel main cap hp rating info at 1:55 on this vid...
("World offers nodular cast iron for applications up to 750 horsepower & billet steel that can handle 2,500-plus horsepower")
[ame]https://youtu.be/lX9OPEuEyBs?t=111[/ame]

Ford also only rated there SVO blocks good for 750hp with there nod cast iron main caps, double that with billet steel...


to the OP, you will get your best advise from the machine shop/builder when they see/check that antique c block out. Best foundation for any high hp setup is a good/thick casting (min 200"+cyl walls) with billet STEEL! main caps.
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btw, heres another busted 600hp n/a C block...
www.the351cforum.com • View topic - My junk
Cracked due to a loose damper the first time.


Second time the block lasted 300 passes with only a minor crack.

I would say that is a testament to the strength of the factory blocks to last that long with a high compression stroker motor, 7000 rpm shifts, stock caps, no girdle, no block fill.
 

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Second time the block lasted 300 passes with only a minor crack.
in a 10 second drag car thats Only 50 minutes/Less than one hour of actual racing lol & theres no such thing as a minor main Crack lol

heres another ST thread with a builder saying the same thing about the thin walls on the old standard production Cleveland blocks...

Dart Iron Eagle FORD block for Cleveland build? • Speed Talk...

("Your customer's 0.090"-wall Cleveland block is about average for what you're likely to find in the U.S. after 42 years out of production. Depending on what the use is, it may work OK IF you don't bore it at all and limit the hp & rpms- eg, a 450hp-or-so street engine. Add in nitrous or any power adder, run it past 6500 for an extended length of time and the thinner cylinders balloon under compression pressures, ruining ring seal or cracking.")

again, the old p/s racers that were making 700+hp with cleveland blocks in the past were NOT using standard production C blocks...

xe/a3/a4 nascar cleveland blocks were what they were using for high hp...


also, P&S had SD Cleveland block offerings in the past too...







 

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again, the old p/s racers that were making 700+hp with cleveland blocks in the past were NOT using standard production C blocks...

xe/a3/a4 nascar blocks were what they were using for high hp...
The A3 and A4 blocks did not exist in the 70s, and the xe blocks were rarer than a winning lottery ticket...

Many of them were using US production blocks, and they were not standard. Of course what can you expect with 800+ horsepower and 10,000 rpm using a stock block?
 

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Boss, you've got an unusually large number of photos of carnage!
 

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theres lots of blown up factory Clev block pics out there to pick from Shaker.

anyways, looks like besides the Arrow and Titus C block offerings the new TBoss C block is getting close to being redone as another option for cleveland guys looking to make/hold big power, this block has been 10+yrs in the making...









its good this new Tmeyer clev block version has a much needed/better 9.350" deck offering (better for 4" cranks), hopefully there not charging extra for it, its a shame the org tb block core was not designed as a 400 block right from the beginning.

also seen MME/Titus finaly has a iron version c block listed...
http://www.titusperformance.com/Performance-Engine-Block-Engine-Crankshafts.html
 

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