Simple Question but may be more

[Graham McMicken <g.mcmicken@shaw.ca>]

Hey all,

I have a 1975 TR6, This winter I will be doing a couple of things to it,
including adding overdrive, tuning carbs (correctly), rings, valves, and
I need some advice on Raising the Compression Ratio. It is currently
at 7.5 (? 7.75 ?) and I want to know what I need to do to raise it, the
benifits, and if its worth while. 

Any comments or suggestions would be great

 Thanks!,

      - Graham

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