Cylinder Bore

[PG <britishcars@shaw.ca>]

I reviewed the archives for this question but could not find a definitive
answer.

 

Does anybody know the maximum over-bore that a 2.9 litre Healey engine can
take.

 

A thread in the archives alluded to +60 thousandths but there was no
definitive conclusion.

 

Also, Does anybody know the related displacement change by the resulting
increase in the bore?

 

Thanks

 

Paul