Quote:
Originally Posted by Tel 911S
Had a look at 1971 App J for Gp 2 .
It says that " overboring of the cylinder block up to the class maximum capacity is allowed "
So that would indicate that a 1600 to 2000 class engine could be freely taken out up to 2000cc .
[ I think for the Escorts , it might be that the original iron block BDAs would not take a large overbore , but the later alloy blocks could go easily out to 2 Ltr . ]
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But that does not help the original poster , so I have looked in the 1965 App J , & as stated by other posters , in that period the max overbore in Gp 2 was 1.2 mm .
So it will be down to what regs the organising clubs run to .