[Fot] GT6 vs TR6 blocks - interchangeability?

[Spitfire Racing]

Folks,
If this is the same Paeco I'm thinking of it had a pretty poor reputation years back and the sale of race parts and "prepared" engines usually just once to customers. They at that time had a line of MG & TR products.
I can say, if in fact this is the same outfit, be very sure of what you're buying. Last incident I heard of was a spridget that had one of their "hot" clutch/PP setups. At high rpm on track at The Glen the PP came apart and shot out the side of the bell housing missing her ankle by maybe 2". Miss Nardi was extremely fortunate.

Russ

-----Original Message-----
From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Allen Washatko via Fot
Sent: Friday, January 29, 2021 7:06 PM
To: Scott Janzen
Cc: 'Friends of Triumph' Triumph
Subject: Re: [Fot] GT6 vs TR6 blocks - interchangeability?

Paeco Racing is closing and selling their inventory at 50%. They have blocks and heads for Triumph’s.

Sent from my iPhone

> On Jan 29, 2021, at 1:34 PM, Scott Janzen via Fot <fot at autox.team.net> wrote:
> 
> I am rebuilding my street TR6.  I need to replace the block - it’s sleeved, bored 30 over, and needs another bore, and I would rather just start over as it’s not original to the car anyway.  It’s 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 “blowouts” on the manifold side to clear a TR6 crank, which none of my other GT6 blocks have.  It’s 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’m pretty sure the GT6 blocks don’t have (though I don’t have a GT6 engine apart and apparently my memory is not that good).
> 
> So, here’s 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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