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[Fot] GT6 vs TR6 blocks - interchangeability?

To: 'Friends of Triumph' Triumph <fot@autox.team.net> definitions=2021-01-29_07:2021-01-29, 2021-01-29 signatures=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 mlxscore=0 mlxlogscore=818 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-2006250000 definitions=main-2101290094
Subject: [Fot] GT6 vs TR6 blocks - interchangeability?
From: Scott Janzen via Fot <fot@autox.team.net>
Date: Fri, 29 Jan 2021 14:33:18 -0500
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
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I am rebuilding my street TR6.  I need to replace the block - it=E2=80=99s=
 sleeved, bored 30 over, and needs another bore, and I would rather just =
start over as it=E2=80=99s not original to the car anyway.  It=E2=80=99s =
a later block with the horizontal reinforcement cast into the manifold =
side, and the car is a 1970.

I have another block, allegedly from a GT6, has a KD number indicating =
GT6, but it has the concave/convex =E2=80=9Cblowouts=E2=80=9D on the =
manifold side to clear a TR6 crank, which none of my other GT6 blocks =
have.  It=E2=80=99s also 25 lb heavier than a GT6 block, and has notches =
at the bottom of the piston bores to clear the con rods, which I=E2=80=99m=
 pretty sure the GT6 blocks don=E2=80=99t have (though I don=E2=80=99t =
have a GT6 engine apart and apparently my memory is not that good).

So, here=E2=80=99s the question - can I use this for the TR6 - is it the =
same block where at some point the factory used them interchangeably?

Or, do I need to find another block?

Scott Janzen=

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">I =
am rebuilding my street TR6. &nbsp;I need to replace the block - it=E2=80=99=
s sleeved, bored 30 over, and needs another bore, and I would rather =
just start over as it=E2=80=99s not original to the car anyway. =
&nbsp;It=E2=80=99s a later block with the horizontal reinforcement cast =
into the manifold side, and the car is a 1970.<div class=3D""><br =
class=3D""></div><div class=3D"">I have another block, allegedly from a =
GT6, has a KD number indicating GT6, but it has the concave/convex =
=E2=80=9Cblowouts=E2=80=9D on the manifold side to clear a TR6 crank, =
which none of my other GT6 blocks have. &nbsp;It=E2=80=99s also 25 lb =
heavier than a GT6 block, and has notches at the bottom of the piston =
bores to clear the con rods, which I=E2=80=99m pretty sure the GT6 =
blocks don=E2=80=99t have (though I don=E2=80=99t have a GT6 engine =
apart and apparently my memory is not that good).</div><div class=3D""><br=
 class=3D""></div><div class=3D"">So, here=E2=80=99s the question - can =
I use this for the TR6 - is it the same block where at some point the =
factory used them interchangeably?</div><div class=3D""><br =
class=3D""></div><div class=3D"">Or, do I need to find another =
block?</div><div class=3D""><br class=3D""></div><div class=3D"">Scott =
Janzen</div></body></html>=

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