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10-17-2002, 01:37 PM
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2 bolt to 4 bolt swap and 2 bolt strength????
Me Again.
Im like a bad movie aint I? Anyway, whats your take on how much a 2 bolt block can handle? What all is involved in a 2-4 bolt swap? Like adding miloden main caps and switching them from 2 to 4 bolt? Tnx, HG 
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10-17-2002, 02:10 PM
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many people have tuned 2 bolt chevys to well over 500 hp with no problems (i would add ARP studs mind you) and with milodon 4 bolt splayed caps you are surpassing the HP capabillities of the blocks born with 4 bolt mains, plus your caps will be way way stiffer than oem 4 bolt caps.
Installing the milodon caps should be a 100 to 150 dollar job at any mashine shop, and many will even do that cheaper. so stick with your 2 bolt block and upgrade to milodon caps if you plan to abuse it regularly otherwise leave it alone (if it aint broke.. dont fix it..) [ October 17, 2002: Message edited by: deuce_454 ]</p>
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10-17-2002, 02:17 PM
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well i have a 2 bolt block with a cast crank and its making 515 hp. 487 ft lbs of torq. it takes a beating and keeps on running strong.
i too used arp studs but with only 2 bolt caps. from what i hear 2 bolts can handle 600 hp and well over 500 ft lbs of torq with a good bolt set up.
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10-17-2002, 03:59 PM
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Installing splayed caps isn't real cheap. It takes alot of work to fit a block for splayed caps. The caps have to be first fit to the block registers, and there should be .001" to .003" of clearance under the outer, stepped portion of the cap. Once this is established, the block must be drilled and tapped for the outer bolt holes, {usually done on a Bridgeport}. Once the drilling is complete, new fasteners are installed, and the caps must be rough bored {they are way undersized}, then the entire block must be align bored or align-honed. Getting a quality job done on this takes some time. I don't know if they still manufacture them, but Program engineering used to make some really nice main caps, but they were about 150 bucks for the center three caps on a small chevy. I would have to think you'll pay closer to 500 dollars to do all of this, including the price of the caps.
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10-17-2002, 04:53 PM
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Are there much involved in adding the main studs?
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10-17-2002, 05:16 PM
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[quote]Originally posted by HemmiGremmie:
<strong>Are there much involved in adding the main studs?</strong><hr></blockquote> Just screw em on in. Chris
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10-17-2002, 05:27 PM
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if you can get aftermarket main caps installed for $100.00 - 150.00 do it. in michigan we get closer to $300.00 for that operation. two bolts are fine if you put in studs. check that the line bore is good, chamfer sharp edges.
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10-20-2002, 02:56 PM
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I'm in Ohio. I only paid $40 to have Splayed caps installed in a 2 bolt SBC 350. Milodon Kit was about$200 from summit.
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10-20-2002, 03:06 PM
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Who did it and where they located? HG
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