<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">The center web is somewhat random. A little bit of dremel work to smooth the hole (if present) has superstitiously worked for me. I have never had a thin-flange or open web block fail. I had a miracle race motor that never had any issues for 10.9 years with a web ot anything else until a rod bolt failed at 8200 rpm. Even that block is getting sleeves and re-used. <div><br></div><div>As for the thin flanged blocks, I gave one to Jeff Porasik in 2004 and it has been in constant use since, currently in Virginia region. I sold a thin flange block to Jeff Kelly last year, which I would never do if I didn’t believe they are absolutely fine, especially for street use. <br><br><div dir="ltr">Ron Soave</div><div dir="ltr"><br><blockquote type="cite">On Feb 21, 2020, at 10:51 AM, Rick Fisk via Spridgets <spridgets@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8">The oil pan flange is very thin compared to later blocks. Most of the '67 12CC engines came with a nitrided EN-40B crank rather than the later tuftrided cranks. There may also be a difference in the center web, can't remember for sure.<br><br><div id="AppleMailSignature" dir="ltr">Sent from my keyboard</div><div dir="ltr"><br>On Feb 21, 2020, at 10:41 AM, crusaderchuck55--- via Spridgets <<a href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr">
<div style="font-size: 10pt;"><div dir="auto">I remember something difrent in 67 internals as opposed to later 1275's. Besides a no air injection cylinder head. What is difrent inside?</div><div dir="auto"><br></div><div dir="auto"><br></div><div><div dir="auto" style="font-size:9pt;"><i>Sent from my LG Mobile</i></div></div></div>
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