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I agree. It's probably a plain 360/390 block.
By Dave Shoe - 11/08/2001 4:53:21 PM; IP 12.2.11.131
Last weekend I picked up another "105" block (from a '76 F150) which has been rumored in books to be the heavy-duty type of FT block which can be bored way out to CJ dimensions. Wrong!

Once again, this block does not have heavy cylinders as found in my genuine "big distrib pilot" FT blocks (which don't happen to have "105" on them). It's got plain old 360/390 cylinders which I've not yet sonic tested, but I assume are good for a .030" or .060" overbore.

The "427" markings on the bulkhead mean nothing about it's displacement. To more accurately determine the displacement potential, you need to remove the core plugs and measure the "coolant" gap between cylinders. Ignore the tight areas of the gaps and focus on the largest gaps you can find. I use drill bits which are graduated every 1/64" to determine what sand cores were used to cast the water jackets.

Roughly speaking, if you can find one spot on the block where you can fit a 1/4" drill bit between the cylinders, its a plain 360/390. If a 7/32" drill bit does not fit anywhere between the cylinders it may have the heavy jackets which define a capacity to go out to 428 dimensions. I still need to check this out more, but if you cannot get a 1/8" drill bit anywhere between the cylinders then you may have a 427 block. I've never checked a 352, and I may check a 330MD this winter. I'll investigate further.

You should expect problems if you bore any FE block more than .030" without a sonic check.

Shoe.
This thread, so far...
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Collapse <a href=../ForumFE/reply.aspx?ID=9181&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9181" onclick="return false;">How do I ID a 427 block?</a>&nbsp;-- <font color=#0000ff>John M. Sutton, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9181', contentMargin: 60, icon: $('anchor9181') }); </script>  How do I ID a 427 block? -- John M. Sutton, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9182&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9182" onclick="return false;">RE: Do The Math</a>&nbsp;-- <font color=#0000ff>Mel Clark, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9182', contentMargin: 60, icon: $('anchor9182') }); </script>  RE: Do The Math -- Mel Clark, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9184&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9184" onclick="return false;">RE: Do The Math</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9184', contentMargin: 60, icon: $('anchor9184') }); </script>  RE: Do The Math -- Royce Peterson, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9186&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9186" onclick="return false;">2 bolt 427</a>&nbsp;-- <font color=#0000ff>Alan Casida, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9186', contentMargin: 60, icon: $('anchor9186') }); </script>  2 bolt 427 -- Alan Casida, 11/08/2001
 Where did you find that block? -- Dave Shoe, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9191&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9191" onclick="return false;">RE: 2 bolt 427</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9191', contentMargin: 60, icon: $('anchor9191') }); </script>  RE: 2 bolt 427 -- Royce Peterson, 11/08/2001
 2 bolt 427 info -- Alan Casida, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9314&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9314" onclick="return false;">Uhhhhh Ooooohhhhh, hey Royce !!</a>&nbsp;-- <font color=#0000ff>P, <i>11/14/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9314', contentMargin: 60, icon: $('anchor9314') }); </script>  Uhhhhh Ooooohhhhh, hey Royce !! -- P, 11/14/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9328&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9328" onclick="return false;">RE: Weird motors in Farm Implements</a>&nbsp;-- <font color=#0000ff>Royce Peterson, <i>11/15/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9328', contentMargin: 60, icon: $('anchor9328') }); </script>  RE: Weird motors in Farm Implements -- Royce Peterson, 11/15/2001
 RE: Weird motors in Farm Implements -- P, 11/15/2001
 RE: Weird motors in Farm Implements -- Davy gurley, 11/15/2001
Collapse <b>I agree. It's probably a plain 360/390 block.</b>&nbsp;-- <font color=#0000ff>Dave Shoe, <i>11/08/2001</i></font>I agree. It's probably a plain 360/390 block. -- Dave Shoe, 11/08/2001
Collapse <a href=../ForumFE/reply.aspx?ID=9194&Reply=9181><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor9194" onclick="return false;">RE: 2 Bolt 427</a>&nbsp;-- <font color=#0000ff>Mel Clark, <i>11/08/2001</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=9194', contentMargin: 60, icon: $('anchor9194') }); </script>  RE: 2 Bolt 427 -- Mel Clark, 11/08/2001
 RE: 2 Bolt 427 -- Davy gurley, 11/08/2001
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