What you have basically is a 4
bolt main block with a 4 bore that is .010 over bore.
Depending of the crankshaft you
install you could have a 302, 327 or 350.
Crankshaft stroke will determine the size of displacement for this
casting.
Good block for build. This 3970010 was first linked to a LT1
install in Corvettes and later used generally in different applications.
Check the main bosses on the
block. If there are other numbers
besides 1,2,3,4 & 5 The block has been line-bored oversize. Most of the time the line bore will be
back the factory specs, but there are exceptions.
Your bock has been machined at
least one time. Not a bad thing,
the block has been seasoned well and should not have problems with shifting of
main or bore alignment.
Hope this helps you.
Leo
----- Original Message -----
Sent: Friday, January 06, 2006 11:00
AM
Subject: [Chevelle-list] SBC
Hey to the list, Hope everyone had a
Happy Christmas a Great Holiday and the New Year is starting out right ! I
have a SBC motor and I can't figure out what it is ? The cast #3970010 when I
looked it up it lists three different possibilities "1969" 302ci 4-blt main , "62-67"327ci 2-blt ,or
"69-80" 350ci 2or4 blt main. then I went and tried to find the casting date(on
rear ledge passenger side) which I think is H 1 87 -
August, 1, 1987 . the stamped assembly date would seem to confirm this,V0827
CHF V= Flint, MI-08=August, 27=day (26 days after being cast) if this is
correct? can anybody tell me what size motor I have or where I need to look to
find later than "1980" casting number listings. thanks in advance,
Jimmy.C ps .010 is also cast in larger numbers
next to the freeze plugs on both sides of the block.
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- Re: [Chevelle-list] SBC Leo John Costigan
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