The later block has two advantages:
1) recesses around the top of the cylinder bore improves head gasket sealing
(less likely to blow a head gasket)
2) there is a reinforcement cast into the side of the later block, which
helps reduce "flex" of the engine block
Terry Geiger
Florence, Alabama USA
http://www.shoalsbritishcars.org
'74 Triumph TR6 (for sunny days)
'59 Triumph TR3A (basket case)
'84 Mercedes 300D (for the wife to drive)
'90 Chevy S10 (parts fetcher)
> Ok, I admit it, I've become wishy washy. I can't decide which of the two
> engines I have to rebuild to replace the ailing one in 1970 TR 6. Given
> that matching numbers aren't that important to me I am seeking the
> collective wisdom of the 6 pack net. I have an engine that I think came
> from a 1970 TR 6 SN CC 65,XXX and a later engine that I think came from a
> 73 or 74 TR 6 CF 13,XXX. Everything else being equal which of the two
> would be the better engine to rebuild and what are the difference? TIA.
>
> Mike Lunsford, 1970 TR 6 (Throttle Body Injection)
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