There is nothing wrong with the heads, just that your compression ratio might be a bit high for more than 6LBs boost

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Thunder 2k1:
<strong> how much would it cost to buy the 5.3 crank and rods, then have someone install them on your 4.8 to make it a 5.3? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Kind of pointless to do that. If you have to break down a 4.8, might as well bore it out .0130 then swap the crank and get a 350 out of it. He has the 6.0. If you have to break into it might as well go big.

Greg

 

yea, nothing wrong with any of the parts, they are all new. like i said, the crank can be replaced easily but the heads are a different story.

 

Depends on who does it and how good they are. I've seen it for $20 a bore and as much as $50.

Greg

 

$20 x 8 = $160 all the way to $50 x 8 = $400 Pretty simple. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Greg

 

duh! <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

 

You will never get a 4.8 bored out to 350 cubic inches (5.7L). It physically cannot happen. Fast48 was quoting the price for typical machine work to bore each cylinder. No one ever said a 4.8 could be made to a 5.7. But, a 4.8 with the rotating assembly of a 5.3 (which would make it a 5.3) could be bored just enought to squeeze out a 5.7 liter. You would still need new pistons, wrist pins and rings on top of the crank and rods.

Its a waste of time if you ask me.