Using a Resleeved LS1 Block bored to 4.185" and using a crank with a 4.125" Stroke, you can get 454 CID for street performance. Now will the crank and rods have clearance inside the block? How much HP can this type of block can handle? I remember someone making a 427cid with a 4.125" crank, but with smaller bore. Any opinions?

 

4.185" sleeved block is like paper-thin. Mine is 4.155" and is borderline acceptable.

I'd go with 4.125" bore and 4.25" stroke, and yes those will fit with a tiny bit of clearance.

-Tony

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nine Ball:
<strong>I'd go with 4.125" bore and 4.25" stroke, and yes those will fit with a tiny bit of clearance.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">With that size stroke, one would need a longer rod right? With the longer rod, wouldn't you lose higher rpm possibilities?