<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">You can’t anywhere near 331 with boring alone. A .060 over block would be around 310 cu in. 60 over is ok but may be pushing it by some measures and could make it run hotter than a stock engine. But I wouldn’t worry about that too much if you have been driving it and the only issue is slow speed on hot days. The cooling system probably needs some TLC. De-scale the water jacket and flush the block out thoroughly. Where I live, refurbishing a stock radiator costs about as much as a direct replacement aluminum. There is a ton of stuff written about radiators on the forums. Blocking off the horn holes in the front bulkhead helps in stop and go traffic too. Aluminum heads do dissipate heat more quickly. And last but not least, you could install a pusher fan in front of the radiator. jmo<div class=""><div class="">Jim B<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Sep 29, 2018, at 4:50 PM, michael king via Tigers <<a href="mailto:tigers@autox.team.net" class="">tigers@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class="">Have you achieved 330 with just boring and not stroke change??? Normally a 332 is done via stroke as well... <div dir="auto" class=""><br class=""></div><div dir="auto" class="">Wondering if you have created same issues as overboring 260 and 289 to far.... They overheat as the bore walls get to thin and close to water jackets</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="">On Sun., 30 Sep. 2018, 04:10 Russ and Tammy C. via Tigers, <<a href="mailto:tigers@autox.team.net" class="">tigers@autox.team.net</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br class="">
I have a 302 bored to 330 and it doesn't like slow running in the heat. I am removing the engine this winter and could make some changes if warrented. Will clean up the engine compartment, throw out bearing, clutch etc. <br class="">
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Do aluminum heads run cooler than cast iron?<br class="">
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Would I be well off to rebuild my very old radiator (stock) with copper or aluminum? <br class="">
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. Russ - <a href="mailto:rtscolgan@yahoo.com" target="_blank" rel="noreferrer" class="">rtscolgan@yahoo.com</a> Thanks again. <br class="">
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